LS1 Help
Thread Starter
Teching In
Joined: Dec 2006
Posts: 37
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From: Bartlett, Illinois
LS1 Help Ok people I am not a LS1 guy, but I need some help. Since I have had a lot of intrest by people on this site that want to participate in the IMSM Series I need to revamp the rules to fit LS1 type cars in a couple of our classes, mainly Street Dominator. Let me give you the basic rundown of this class and the idea behind it. This is a stock block only class, single power adder, street type car class (expecting a range of 9.7's - 10.50's) Tire and a weight limit. Some pretty basic stuff 28x10.5" max tire. 3200# power adder, 2800 n/a. Pretty simple, but this is just an overview. Take a look at the main site for more details. www.imsmracingseries.com
My question to you guys is to educate me on LS1's on what it takes to get an f-body or vette into the low 10's high, mid to high 9's with a stock block and still keeping it a street car. What are some typical bolt on? My best friend has an f-body and does very well with it, but I want to know more about power adders on f-bodies. I want a lot more f-body guys out there so I want to make it easy for you guys to participate. Plus I do not want a mess of headaches at the track when there are loop holes in the rules. Any help from you guys would be great.
My question to you guys is to educate me on LS1's on what it takes to get an f-body or vette into the low 10's high, mid to high 9's with a stock block and still keeping it a street car. What are some typical bolt on? My best friend has an f-body and does very well with it, but I want to know more about power adders on f-bodies. I want a lot more f-body guys out there so I want to make it easy for you guys to participate. Plus I do not want a mess of headaches at the track when there are loop holes in the rules. Any help from you guys would be great.
I think the majority of racers on this site could not compete at a mid to high nine second level. I think most on here would be closer to high tens on a good day. I am by no means an expert and I am sure people will disagree. Just my .02.
-JZ
-JZ
To get an f-body into the low 10's high 9's your going to need a new forged shortblock or forged internals inside your stock block. Most guys running those numbers seem to go bigger CI as well, usually a forged 370 iron block, 402 ls2, or 408 iron block over the stock 346. There are some guys here running a forged 346/347/348 (stock ls1 CI) with a power adder (turbo or S/C) that are hitting low 10's and even 9's (KP and Pro Stock John come to mind) but a majority seem to go bigger. Keeping it a street car is going to be difficult as your going to need a fully built drag suspension and drivetrain to hook up and run a 9 second pass, and that usually involves an auto setup (th400 or 4l80e), trans brake, huge stall, etc, which isnt too street friendly. Then there is the fuel system, rear end, wheels and tires, roll cage, etc...But if you mainly looking for a stock CI displacement setup with forged internals and a power adder I would contact KP, Pro Stock John, or Mighty mouse on this board as they would have plenty of info for you.
Thread Starter
Teching In
Joined: Dec 2006
Posts: 37
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From: Bartlett, Illinois
Ok, let me tell you guys a little more about what happening at IMSM in S/D. I will use my car from last season and another racer. Stock block 302's and 351's. Dynamic c-4 on the brake, stock rear suspension, factory interior from the front seats forward, no alteration to firewall, pretty basic stuff. everyone was running 10.50's and faster with one guy that broke out a 9.90 something. All of these cars can be driven to the track if need be and still plated and insured. I would love to see more of you guys out there for one more racers the better plus it is always cool to see ford vs chevy showdowns. LS1 Power vs Ford power.
The only thing that wont work for any LSx is the TB limit. I would say that 90 would work better. I would guess that most guys running the #s have a larger TB.
I am trying to get my car finished and tested before the opener
I am trying to get my car finished and tested before the opener
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I would say that a mid to low 10 second LS1 could be had with a stock short block and nitrous, not saying it would be bullet proof but there are plenty of cars that run mid 10's with heads, cam bolt on's and a cecent hit of N2O. Like was said, the TB limit has to change if you want a decent showing of LS1's, there are so many guys running the FAST 90/90 set-up.
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Teching In
Joined: Dec 2006
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From: Bartlett, Illinois
well we can change that for rule around. i want more LSx's out there to race. Basically I don't want an LSx to run away with the show. How do we level they playing field a little. any suggestions?
Originally Posted by IMSM
well we can change that for rule around. i want more LSx's out there to race. Basically I don't want an LSx to run away with the show. How do we level they playing field a little. any suggestions?
I went 9.40@143 with a stock LS6 intake a slightly ported stock 76mm TB @ 3450 raceweight a couple of years ago. Combo probably could have went 9.2@146 had I stayed with (and played with the tune).
Here are some ideas, but don't jump all over me later if others don't agree...
-Min raceweight of 3400, because a guy with a cage and no weight reduction would be pushing 3700 or more.
-Stock TB is okay for low 9's, maybe even 8's. But allowing folks to run 90mm stuff is not a big deal.
Fastest stock cube guys around IL have gone 9.3-9.7 with T400 trans, power adder, and other stuff.
Most of the big turbo stuff around here runs 370-408ci cubes, and some of that stuff could go 8.4's if they really pushed it.
Here are some ideas, but don't jump all over me later if others don't agree...
-Min raceweight of 3400, because a guy with a cage and no weight reduction would be pushing 3700 or more.
-Stock TB is okay for low 9's, maybe even 8's. But allowing folks to run 90mm stuff is not a big deal.
Fastest stock cube guys around IL have gone 9.3-9.7 with T400 trans, power adder, and other stuff.
Most of the big turbo stuff around here runs 370-408ci cubes, and some of that stuff could go 8.4's if they really pushed it.
Thread Starter
Teching In
Joined: Dec 2006
Posts: 37
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From: Bartlett, Illinois
Originally Posted by SSilverSSurfer
best way to level the playing field is to NOT let LSx cars in the event, because they will(and i stress this) run away with the show
I knew something like that would pop-up
9 Second Club
Joined: Nov 2003
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From: Norn Iron
Originally Posted by Doofy
The only thing that wont work for any LSx is the TB limit.
Originally Posted by JD1969
Like was said, the TB limit has to change if you want a decent showing of LS1's, there are so many guys running the FAST 90/90 set-up.
Thread Starter
Teching In
Joined: Dec 2006
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From: Bartlett, Illinois
Originally Posted by Pro Stock John
I think a 3400 or higher min raceweight, one stage nitrous, one power adder max, and most folk would be 9.5-10.2.
there is already a "on power adder rule"
sounds good. so here is what i ahve to work with
F-Body or LSX type motors
90mm TB max
3400# min
Stock Block
Phil, here is the problem I see with Street Dominator. You stipulate a max turbo of 76mm, but allow a YS Vortech. Looks like a NMRA Renegade or Drag Radial car owns this class. Mid 8's would be no problem unless they are running 4" to the TB and 90mm TB's. On the other hand a lot of LSx guys go to 90mm TB's. I'd cap this class at a T-Trim if you want to slow it down a bit. With a 76mm and T-Trim cap, engine size is less of an issue.
By 'stock block' do you mean stock pistons/rods or just the block?
I'm on a stock block at 3400 lbs, 10.5 inch tires/stock suspension, LS6 intake, stock (78mm) TB, exhaust, power steering/brakes/windows etc, all plastic in the interior etc and run low nines pretty easy.
But I wouldnt run off and handicap the LS1s off the start, 80% of the cars similar to mine might not even get in the 9s so if you start adding weight before anyone shows up people just wont show up. 3400lbs is on the heavy side for a nitrous car..
Also the production prochargers for these cars (f-bodies and C5s) are reverse rotation and forward facing inlet.
I'm on a stock block at 3400 lbs, 10.5 inch tires/stock suspension, LS6 intake, stock (78mm) TB, exhaust, power steering/brakes/windows etc, all plastic in the interior etc and run low nines pretty easy.
But I wouldnt run off and handicap the LS1s off the start, 80% of the cars similar to mine might not even get in the 9s so if you start adding weight before anyone shows up people just wont show up. 3400lbs is on the heavy side for a nitrous car..
Also the production prochargers for these cars (f-bodies and C5s) are reverse rotation and forward facing inlet.
Last edited by kp; Mar 7, 2007 at 10:01 AM.