LT4 swapped with LS9
Race Director
Joined: Sep 2001
Posts: 14,668
Likes: 749
From: NEwhere Ohio
My first impulse is: "If you wanna lay down some BIG numbers then get yourself a BIG BLOCK"
My 2nd impulse is: "Go BIG or go HOME"
After doing options 1 & 2 i'd just rather build a mild 350 combo and boost the **** out of it. Way easier, far less hassle, less time, likely more reliable. 500whp easily. When you're running boost head flow isn't as important as some will lead you to believe but it sure does help.
Yank your motor, install a fully forged & balanced rotating assembly, install a midrange set of heads and a mild cam, and toss any number of available centrifugal charger kits or turbo kits on the car. goals accomplished.
My 2nd impulse is: "Go BIG or go HOME"
After doing options 1 & 2 i'd just rather build a mild 350 combo and boost the **** out of it. Way easier, far less hassle, less time, likely more reliable. 500whp easily. When you're running boost head flow isn't as important as some will lead you to believe but it sure does help.
Yank your motor, install a fully forged & balanced rotating assembly, install a midrange set of heads and a mild cam, and toss any number of available centrifugal charger kits or turbo kits on the car. goals accomplished.
Toss any number of avaulable centrifugal charger kits on it.
The single belt procharger ltx and vortech ltx (now discont'd) kits belt slip limiting max boost somewhere around 6 psi. I did see 8 psi once out of it (on a new belt), but that quickly dropped back to 6 as the belt wore in).
There is only one bracket that works and , unless you can make them yourselves like Aaron at AKS Racing, that bracket is the one from greg@blowerworks.
Pay him the money and have him build you a bracket for it with dedicated drive (2 belts, 1 for super charger, 1 for acc). Be done with it.
Dont buy any of the garbage 'kits' out there. I mean yeah, the head units are good quality, but FMU's and belt slip, ha. Go with big injectors, a tune, and a bracket that wont belt slip.
As for turbochargers, Im not aware of anyone that makes any off-the-shelf pieces for our cars.
Plenty of stuff for lsx, but not us.
Thread Starter
Advanced
Joined: Apr 2009
Posts: 90
Likes: 0
Awsome guys i learned alot from the comments. To answer a few questions about why use road tires, well I just want a car that pulls and pulls especially at top end and on the highway. I am perfectly happy with the acceleration I can get on the stock tires except I want it to keep on pulling even past the 150 mark. If I can get more grip I would but my main concern is not breaking anything. I have decided to build up the engine instead of doing a swap from all the comments I have read. I want to keep it as authentic as I can but I want this GS to be back in the game with the big dogs =) When I am ready with the money I would defently appreciate the help with sorting out all the parts. I am very thankful for the help so far. So 355 with a supercharger is my best bet. What boost would that engine need for the 600rwhp mark and how high could I rev this engine with the right parts? I love high revving engines. I am also a motorcycle guy.
Team Owner
Joined: Oct 2004
Posts: 81,241
Likes: 3,063
From: altered state
St. Jude Donor '05
They mentioned 7000 max with that computer
Gotta figure max budget. So many ways to go on heads, cams (solid roller or hydraulic) etc. If youre going to boost it dont go cheap on ANYthing youll regret it. Means stay away from teh cheapie Ebay stuff.
Gotta figure max budget. So many ways to go on heads, cams (solid roller or hydraulic) etc. If youre going to boost it dont go cheap on ANYthing youll regret it. Means stay away from teh cheapie Ebay stuff.
Melting Slicks
Joined: Mar 2004
Posts: 2,141
Likes: 2
From: Pittsburgh Pa
Awsome guys i learned alot from the comments. To answer a few questions about why use road tires, well I just want a car that pulls and pulls especially at top end and on the highway. I am perfectly happy with the acceleration I can get on the stock tires except I want it to keep on pulling even past the 150 mark. If I can get more grip I would but my main concern is not breaking anything. I have decided to build up the engine instead of doing a swap from all the comments I have read. I want to keep it as authentic as I can but I want this GS to be back in the game with the big dogs =) When I am ready with the money I would defently appreciate the help with sorting out all the parts. I am very thankful for the help so far. So 355 with a supercharger is my best bet. What boost would that engine need for the 600rwhp mark and how high could I rev this engine with the right parts? I love high revving engines. I am also a motorcycle guy.
Burning Brakes
Joined: Sep 2004
Posts: 869
Likes: 1
From: Bradford Pa
I have a set of ZR-1 wheels (17x9 & 17x11) just for this reason. At a minimum i expect to need to run a 315 wide DR just to hook on pavement consistently at ~500whp - i'm sure some street tires are stickier than others but for the miles the car will see I probably will do the DR's. IF i ever get the gall to lower the compression and make a street machine out of it i can always toss some Sumo's on the back...
Thread Starter
Advanced
Joined: Apr 2009
Posts: 90
Likes: 0
traction is defently important I guess I will figure it out as I go. Not sure how wide my current rims are but it seems like they might have room for something bigger then a 315.
Last night my window guide snapped and the window went off center without me seeing at night...as i was closing the door it hit the side of the roof piller and scraped the paint...now i have to figure out i way to fix the deep scratch ;(
Last night my window guide snapped and the window went off center without me seeing at night...as i was closing the door it hit the side of the roof piller and scraped the paint...now i have to figure out i way to fix the deep scratch ;(
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Race Director
Joined: Sep 2001
Posts: 14,668
Likes: 749
From: NEwhere Ohio
Bah... just run a drag radial (even 275 sec. Width drag radial is better than a 315 uhp street tire), lower air pressure for competitive events, be careful in the rain, and avoid the rain when they are worn out...
Race Director
Joined: Sep 2001
Posts: 14,668
Likes: 749
From: NEwhere Ohio
Awsome guys i learned alot from the comments. To answer a few questions about why use road tires, well I just want a car that pulls and pulls especially at top end and on the highway. I am perfectly happy with the acceleration I can get on the stock tires except I want it to keep on pulling even past the 150 mark. If I can get more grip I would but my main concern is not breaking anything. I have decided to build up the engine instead of doing a swap from all the comments I have read. I want to keep it as authentic as I can but I want this GS to be back in the game with the big dogs =) When I am ready with the money I would defently appreciate the help with sorting out all the parts. I am very thankful for the help so far. So 355 with a supercharger is my best bet. What boost would that engine need for the 600rwhp mark and how high could I rev this engine with the right parts? I love high revving engines. I am also a motorcycle guy.
Id do solid roller too if you want the rpms.
