GMC Truck Forum banner

1 - 20 of 20 Posts

·
Registered
Joined
·
2,525 Posts
Discussion Starter #1
Howdy,
I'm looking for a manifold for my 5.7L vortec. Ive been searching for a couple weeks now and i thought GMPP or GMPD had one but i can't seem to find one. The main reason im looking for one is i need more hp. A manifold will gimme some fairly good gains for the price.

Any help is appreciated,
Dave E.
 

·
03 Tahoe
Joined
·
1,364 Posts
There are no aftermarket intakes for 96-98/99/00 trucks. Currently there are also no aftermarket injectors either. What power gains are you looking for and at what budget? There are a tons of worthy mods to do for pushing hp on the first gen vortec engines....

Cameron
 

·
Registered
Joined
·
2,525 Posts
Discussion Starter #3
I know there are a ton of other aftermarket mods and i have those on plans to be done by spring. My current plan will put me at 435HP and a 12.43 1/4 mile in full street trim and if traction is there. I know manifolds could boost up that power a little bit and was not sure. I can list my current performance mods and maybe you guys could list some better options or whatnot? Just please keep in mind this is a daily driver and im only 15 (16 in 13 days) so i don't have $5K to drop on new heads or have money for an LS1 swap even tho i refuse to do that.

Thx for your help,
Dave
 

·
03 Tahoe
Joined
·
1,364 Posts
Well...let's hear your plans and go from there. Also how did you figure 435 hp and a 12.43 1/4 mile?

I don't have any clue where you got a %k head quote?!?! They cost significantly less than that and so would an LS1 engine swap. Give us more info and we'll work from there....

Cameron
 

·
Registered
Joined
·
2,525 Posts
Discussion Starter #5
I kinda pulled the $5k head quote from the air, i know my bro's heads are $2500 a piece for his LT1 in his 85 'maro.

Alright i'll just make a long ass list of everything thats going on the truck.

1. NX Hitman 150 shot
2. CAI (AEM Bruteforce probably)
3. Custom Tuned 'puter
4. Ill be porting my manifold myself
5. CFM Tech TB
6. Dual Electric Fans
7. Banks PowerPack Exhaust
8. TBI Spacer (im debating on if i should try to make it a NX plate as well)
9. Pulleys
10. Minor weight reduction (spare tire, jack, myself)
11. Hoosier Quick Time Pro's
12. Cal-Trac's
13. Synthetic Oils (proven to gain 5-10)
14. Jet Rev/Speed Limiter Delete

Im gonna call my bro tonight and hopefully he'll get back to me, we figured 435hp or right around there...i know thats the majority of the stuff, ill post more when i reach him, he's got some "tricks" to get some more hp.
 

·
Registered
Joined
·
1,816 Posts
s3gulit said:
I kinda pulled the $5k head quote from the air, i know my bro's heads are $2500 a piece for his LT1 in his 85 'maro.

Alright i'll just make a long ass list of everything thats going on the truck.

1. NX Hitman 150 shot
2. CAI (AEM Bruteforce probably)
3. Custom Tuned 'puter
4. Ill be porting my manifold myself
5. CFM Tech TB
6. Dual Electric Fans
7. Banks PowerPack Exhaust
8. TBI Spacer (im debating on if i should try to make it a NX plate as well)
9. Pulleys
10. Minor weight reduction (spare tire, jack, myself)
11. Hoosier Quick Time Pro's
12. Cal-Trac's
13. Synthetic Oils (proven to gain 5-10)
14. Jet Rev/Speed Limiter Delete

Im gonna call my bro tonight and hopefully he'll get back to me, we figured 435hp or right around there...i know thats the majority of the stuff, ill post more when i reach him, he's got some "tricks" to get some more hp.
I'm no expert, but I think going from 255 hp to 435 hp with those mods is a tad optimistic...
 

·
Registered
Joined
·
2,525 Posts
Discussion Starter #7
Yeah like i said, im gonna call my bro tonight and see what else he said i could do...i know thats a majority of the stuff and could easily crank out 400horse (not necessarily at the wheels but still).

240hp+150+10+20+20+10+45+8+5

Well, lets hope i get those gains
 

·
03 Tahoe
Joined
·
1,364 Posts
Well, a port and polish of the intake w/ port matching is worth quite a bit for the stock vortec intakes. It will flow much better. You will have no need for an aftermarket intake (especially since one doesn't exist). Your HP gains are optimistic. Custom tunes get rid of/adjust rev limiters and top speed points.

You may see 400 hp....all those mods will equal a cumulative power increase and each individual "claimed" HP increase are really just generalizations based off a stock motor vs. a stock motor w/ that particular mod. You may see 400 hp at the fly....MAYBE....

On the banks exhaust, do you plan on getting the headers or only the cat back?

The nitrous will be better plumbed into the intake tube.....It will atomize better there...I would not do it on a TB plate....

Do you have a limited slip or posi rear end? Are you planning on a torque converter? Probably be a great idea if you plan on hitting the strip...probably a 1500-1800 stall. Do you have a shiftkit and or vette servo? The transgo shift kit and a vette servo will be a very very good idea for the increased power. You will also want a secondary transmission cooler.

Whos' doing your custom tune? Westers? SPE? Ed Wright?

$2500 a piece for LT1 heads?!?!....explain? That is $5k for heads....hope they are made of gold.

Something to think about...pullies underdrive accesories and you'll be pulling more amps with a dual fan electric kit. May have some voltage issues...

If your gonna juice an engine you may wanna consider a cam...something a little more juice friendly.

My brother just bought a 97 vortec 355 with these mods:
1997 Vortec 350, .030 overbore (355 ci)
Polished Crank
Speed Pro Forged Pistons and Connecting Rods
Completely Balanced Rotating Assembly
Stock Vortec Heads Rebuilt w/ Mild Port & Polish
Milled for Heavy Duty Valvesprings
Comp Cams Compucam - 212/218 488/495 112* lsa
Miloden Oil Pump
Cloyes Double Roller Timing Chain
Stock Intake w/ Stock Fuel Injection
Intake Elbow w/ Computer Matched Granatelli MAF
Stock Ignition Components
Helix TB Spacer
SPE Custom Tuned PCM
That is a solid 300 flywheel horse motor w/o nos. W/ a 150 shot it may see around 430....

There isn't any way you'll see what you think you'll see w/o a cam, complete porting, port matching, and polishing along with some other considerations.

Cameron
 

·
Registered
Joined
·
2,525 Posts
Discussion Starter #9
Yeah I don't think i'll dig into the engine internals until i hit my limit on the top end. I think i can pull 400hp out of it without new pistons/cam etc.

The banks exhaust is a full kit from the headers to the 4" tip. Its a bit pricey but it "shows" gains of 46hp and 58ft lbs.

Nitrous wise, ive heard 4cyl s10 guys running 150shots on the stock motor so that leads me to believe on the street/strip scene i could push it s'more and maybe run 175-200. Im risky.

Ed is going to do the tune, he seems to take in every consideration and modify to the full extent and thats what im looking for. Racing experience doesn't hurt either, lol.

I don't think ill have voltage issues personally, if i do i can go steal my brothers amp no biggie.

It's a 3.73 Posi Rear End on the tiny ass pos tires. I'll be getting 20's...but at $2k i can wait awhile.

I've considered getting a shift kit, but im not quite sure on it. Its just the stock 4L60E. Theres not too many tranny shops around here so i'd have to take it up to Arlington heights and have the ASE mech there work on it...last thing i wanna do is fck up a tranny. The secondary Trans cooler is a future plan, probably over the winter when i don't drive my truck since i don't want to get it rusty, lol. I drive our 95 long bed ext cab with 4.10 gears :head:
I might throw on a torque converter this winter while the trans is away at a shop too (if i have money for it and the shift kit). I'm not REAL sure about funding even though im working 2 $7/hr jobs (not alot, but i don't have alot of expenses only being 15)

I was thinking of upgrading to a stronger trans by Rossler (worlds strongest racing automatic) but i want some fuel economy.

I'll DD my plans later tonight after i get some free time and see what it says, since we all know DD is damn near within 10hp everytime.
 

·
03 Tahoe
Joined
·
1,364 Posts
No more than 150 on stock internals. This has been pushed and you'll blow head gaskets. You want this to be a reliable DD but you seem to be wanting to push what I will call the reasonable limits of a stock drivetrain especially in the transmission dept. 4l60e's aren't weak but need improvements to last under higher hp mods. For 50 bucks and maybe 2 hours at least drop a cooler on the dang thing.

You need to put some thought into your plans. You want 400+ horsepower and a crapload of nitrous but you seem to not want to do any of the work to make sure you plant it right. I can tell you from seeing it a lot that a 150 shot on a stock trans a few times can be hazardous.

DD isn't real world and it doesn't take into consideration how it'll be planted to the ground.

Ed is going to do the tune, he seems to take in every consideration and modify to the full extent and thats what im looking for. Racing experience doesn't hurt either, lol.
Is he tuning your MAF to the PCM?

Yeah I don't think i'll dig into the engine internals until i hit my limit on the top end. I think i can pull 400hp out of it without new pistons/cam etc.
Yes, you can but if your concerned about the daily drivability and you want to get the best efficiency out of the nos you'll do a cam. If your gonna do porting like you mentioned a cam change won't be tough at all.

Just things to think about....you say you don't have $5k to spend than I'd really put some thought into what you'll do if you blow the pistons out or destroy a tranny or blow a head gasket. Don't put yourself into a situation where you can't afford to fix something you blow up because you totally exceed the reasonable capabilities of stock components. You can't drop a 150 shot of nos on a totally otherwise stock drivetrain and expect it not to suffer.

Nitrous wise, ive heard 4cyl s10 guys running 150shots on the stock motor so that leads me to believe on the street/strip scene i could push it s'more and maybe run 175-200. Im risky.
A stock 4cyl in build no better or weaker than a stock 350. What makes you think it'll handle a 200 whot w/ blowing crap up? You cannot just nos the crap out of a motor and expect it to live under that.

I can appreciate your enthusiasm about doing mods and getting power but you need to look at your big picture. It's a daily driver you can't drop $5k into yet you wanna drop enough NOS on it to roast everything in your drivetrain!?!?!

You should also be aware that there are NO AFTERMARKET injector upgrades AT ALL for those first generation vortec cpi engines.

Cameron
 

·
Registered
Joined
·
2,525 Posts
Discussion Starter #11
I was talking to some people on the silveradoss chatroom and they said i should easily be able to push 400hp and keep it as a daily driver. Yeah i don't wanna throw $5k into it at once, c'mon. This is over what? a damn near 9 month period to get it to the 12's and 400hp. I'm not too worried about frying the drivetrain, if a trans blows i can get other 4L60/4L65's for relatively cheap.

I want 12's and i'll do as much as i can to get there without pulling the motor and doing internal mods yet.
 

·
Registered
Joined
·
1,895 Posts
s3gulit said:
240hp+150+10+20+20+10+45+8+5

Well, lets hope i get those gains

That kind of math only works if you include the "sticker multiplication factor." To get a current value, consult with the experts at www.gotstickers.com :LOL:

Cameron is dead on with this one. Many before you have gone down this road before. :read:

Make sure you take videos of your truck when you run a 200 shot on the stock tranny and rear end. I enjoy watching things blow up.

You can get heads and a cam for your motor for about half of the price you listed.
 

·
Registered
Joined
·
2,525 Posts
Discussion Starter #13
Yeah i know i can get heads and a cam for cheap-o just my bro's heads are $2500 a piece for his lt1, thats what i was referring it to.

I dunno, i get varying opinions. Couple guys in the gm-trucks/silverado ss chatroom said i can easily make 400 on a stock bottom end motor. You two are, so far, the only ones who said i can't. I don't plan on running a 200shot until i can afford to blow the motor and rebuild it or do an ls1 swap. lol

Got a question for ya, my bro was going to shit his 94 lt1 in his 85 camaro, and go with a more racey version of it. I hate LS1's and don't even wanna try to deal with the pos problems they are cursed with. Can i throw a regular lt1 in my truck? sure I'll definately be considering stronger gears and a tranny with 645hp at the fly, but i was just curious if he gets serious.

Would i be the first person to throw an LS2 in a OBS silverado as well? I figured pretty soon someones going to be wrecking an SSR/SS/GTO (people say its supposed to get the LS2)

thx again.
 

·
03 Tahoe
Joined
·
1,364 Posts
I dunno, i get varying opinions. Couple guys in the gm-trucks/silverado ss chatroom said i can easily make 400 on a stock bottom end motor.
I never said you couldn't hit 400 on a stock bottom end. A cam is not considered bottom end. You don't seem to realize how much power you'll gain from a nitrous friendly cam. You can run a nitrous cam, less nitrous and get more power than running a straight 150 shot. Mods work together to make power....

You say this:
I hate LS1's and don't even wanna try to deal with the pos problems they are cursed with.
but then you say this:
I don't plan on running a 200shot until i can afford to blow the motor and rebuild it or do an ls1 swap.
:think: :think:

Yes, you can drop an LY1 into your truck but you should realize they are, in stock form, less capable of boost and nos than your motor.

A lot can be said about building a motor to hold power instead of blowing one up.

Cameron
 

·
Registered
Joined
·
601 Posts
91_bowtie said:
That kind of math only works if you include the "sticker multiplication factor." To get a current value, consult with the experts at www.gotstickers.com :LOL:

Cameron is dead on with this one. Many before you have gone down this road before. :read:

Make sure you take videos of your truck when you run a 200 shot on the stock tranny and rear end. I enjoy watching things blow up.

You can get heads and a cam for your motor for about half of the price you listed.

:word:

You need to plan what you are going to do a little better. And about S10's, that 2.2 (stock) is a POS and can't handle much. I'd check out your sources. I really think that 400 is quite optimistic, as are 12's. Look at most vehicles down in that time, they are built for that, not stock. I'd also be a little worried about gernading that G80 10-bolt POS and burning up the tranny if you plan out putting 400HP down.

Just don't get your hopes up too high and be disappointed, good luck with the mods :head:
 

·
Registered
Joined
·
2,525 Posts
Discussion Starter #16
yeah i know i said id swap an ls1 if i did blow it, im a crackhead and forget things. But they are cursed.

I just don't feel like pulling the motor and everything to do a cam swap. Maybe in the winter once i get my real shop back since my bro's car is still occupying it. I know i can buy some damn good cams for $300.

My brothers LT1 isn't exactly in stock form by any means, but i understand what your saying.

Tranny wise, i know a guy running a 98 T/A, with a 400shot and a not so stock motor and his trans is still "there" unless they made them or stronger. Would a 4L65 be a better option or what would you guys reccomend for a tranny? I've got a couple th350's layin around in our barn. I know 700r4's are pos my bro went through 3 in 2 months.

Also cam wise, what would you suggest thats streetable yet nitrous friendly?

BTW: Could i get the the stock specs for the 96-98 Vortecs? CFM, Cam, Head, Stroke, Bore, Exhaust & intake valve inches, etc. Or a place where i could find it?

Thanks again
Dave
 

·
03 Tahoe
Joined
·
1,364 Posts
A) no motor pull is required to do a cam change....

B) a 4l60e will be fine if the right mods are done to it. Not stock tranny can take craploads of power w/o extra precautions and considertations to live longer and perform better for you....

C) stick with the 60e....unless you wanna completely ditch the electronics that your truck runs on.

D) a nice streetable nos friendly cam is posted in the engine specs I posted earlier....

Tranny wise, i know a guy running a 98 T/A, with a 400shot and a not so stock motor and his trans is still "there" unless they made them or stronger.
I sure as hell hope he's got a beefed drivetrain. The best 4l60e's built on the planet can hold 650 hp or so....so getting a well built 4l60e or even just a stock one with the mods I suggested will be just fine under a cammed motor w/ nitrous if the right things are done.

I know 700r4's are pos my bro went through 3 in 2 months.
Ummm...ok. You do know that a 4l60e is just an electronic 700r4 right? If not, you do now. If your brother put stock 700r4's behind a modded lt1 engine than they may not last all that long. Just because a few go out doesn't mean they are POS's...just mean that there may be perfectly good reasons why they are going out....too much power, wrong tc, not enough cooling, etc. The stock 3-4 clutch packs in 700r4's and 4l60e's are notorious for going out from overheating....heat is your trannies worst enemy.

Seems like your new to engines, power, and whatnot. Everyone has to learn somewhere and sometime and one of the most important things to learn about is how mods work together and compliment themeselves. If there is a weak link in the chain none of the other mods are worth anymore than that weak part can supply.

Cameron
 

·
Registered
Joined
·
2,525 Posts
Discussion Starter #18
I'm not necessarily to new to motors, cars, etc.

I'm just new to this electronic stuff. I've been around carb'd stuff since i was 8-9 probably. I know a 4l60e is an electronic 700r4, im just saying their not great from what ive been though. I'll give ya their could've been a lemon, or just a pos tranny that was finished late on friday.

Do you guys have a reccomendation for a tranny kit besides B&M? Haven't had good deals come from them either and would prefer to stay away from them.

Thanks for the help, again. I guess i might consider doing a cam/head/manifold job over the long 4th of july weekend or something.
 

·
03 Tahoe
Joined
·
1,364 Posts
The trango kit seems to be more popular than the b&m....

Cameron
 

·
Registered
Joined
·
1,895 Posts
:word: The TransGo is a much better kit.


I was talking about the stock drivetrain and valvetrain not being able to support 400hp. No where did I mention the bottom end. It is very capable of supporting 400hp. With the mods you listed, you will be VERY lucky to break 13.50, at sea level, with excellent traction, and ideal conditions.

As for the TA running a 400 shot...Are you sure he doesn't have the M6? There's no way that a stock 4L60e could take that abuse. If that tranny was stock, which I highly doubt, it wouldn't last more than 3 passes.

There are very few differences between the carbed motors you've "been around," and the L31 in your truck. It's the same principle... You need to move air to make power, and the stock cam is really holding you back.

BTW...What heads is your brother running on the LT1?
 
1 - 20 of 20 Posts
Top