Just curious about LS1's

[NPS Nova]

I'm more than a little curious about some of the posts in this forum. It's been posted that a little chassis work, NOS in the 300 range, and a good heads and cam, that your will into the 9.'s? Can this be true? What about weight and street drivability?
What about converting back to a carb set up. Faster or slower than with EFI on the above stated combo?

TOO the guys who really get into these cars, he's a little question:

LS1 "style" engine, any heads and cam and intake, 408 or smaller c.i., T400 in a 2000 Camaro, 3200 lbs BUT a 80 mm turbo. HOW FAST COULD THIS COMBO POSSIBLE BE? 8.17 like The "RED ONE"?

Thanks for your time, John:cool:

[LTLHOMER]

I'm more than a little curious about some of the posts in this forum. It's been posted that a little chassis work, NOS in the 300 range, and a good heads and cam, that your will into the 9.'s? Can this be true? What about weight and street drivability?
What about converting back to a carb set up. Faster or slower than with EFI on the above stated combo?

TOO the guys who really get into these cars, he's a little question:

LS1 "style" engine, any heads and cam and intake, 408 or smaller c.i., T400 in a 2000 Camaro, 3200 lbs BUT a 80 mm turbo. HOW FAST COULD THIS COMBO POSSIBLE BE? 8.17 like The "RED ONE"?

Thanks for your time, John:cool:
With an 80mm turbo, I don't see the car going very far into the 8's. And you'd want to keep the cubes down on a combo with a max 80mm turbo...stock cube would be more than enough...hell destroke the thing and it'd probably make more steam. A 408 would go slower than a 346 with a max 80mm turbo from what little I know about turbo stuff.

The red one is quite a machine and was sporting a big 94+ mm turbo...it might be a 101 I forget now.

And doesn't the OSCA (that's where the 80mm comes from right) require stock computer as well for fuel injection stuff? There's only a few guys that can manage with that in the sub 9-second zone, actually just one I know of.

[NPS Nova]

LTL, your right on the 80mm Turbo deal, OSCA. Just trying to gte some info. I had always wanted to run T/S, but my stuff isn't allowed, Pontiac Pro Stock headed Big block. So might try something different.
As for the computer needing to be OEM, I couldn't tell you on that, that's why I was wondering about a blow-thru. Like a F1r blow-thru or the 80mm.
A buddy of mine bought a Rolex 24 hour race motor, LS1 with a bunch of 405hp Z06 stuff. Mostly stock OEM short, balance and blueprinted. Has the GM "HOT" cam and a set of Linginfelter ported OEM heads. When he bought it, it had a LSX intake and was "soposed" to dyno @ 526 on the motor, 346 inch.
Just wondered if maybe I should buy something like that for a few projects I would like to do. Maybe hit it with the 300 hit Nitrous. Was looking at putting it into like a 2700 lbs Chevy II.

So I gues what I'm saying is making the thing run 8's and be streetable. Just a little sideline I was thinking of. Also would like to do a 1955 Nomad with a "mild" LS1 and a 6 sp. for a daily driver. Maybe look at at GM crate style set up with the computer and everything needed. Thanks, John:cool:

[DERTY]

I ran mine at 3400+ pounds with a TH400, a 382 inch LS1 (up from 346) and a 200 shot and could go 9.70/9.80 all day. With a 300 it was going 9.50's at 145 to 147. That was on a pretty basic motor. If you built one with the heads that are available today and put a 300 shot on it, bottom 9's would not be all too difficult at that weight. I drove it all over the place too.

I prefer the EFI setup. It allows you to really play with the things to a lot finer degree and then run it. The carb stuff is ok, but there are not that many that are doing anything with it just yet. It would be original though.

For the money, there are far better alternatives for these engines than just the GM stuff. It really depends on where you want to compromise between the street and strip aspect. There are a lot of very affordable street / strip engines that are out from very reputable shops that I would consider first. None of the GM crate motors are going to handle a 300 shot for any lengthy duration as well. They're also too high of a compression to run boost on.

If you are trying the turbo deal, a 80mm is not going to keep up very well. Not to put you into the 8's unless the car is light as hell. The airflow rate on the turbo would have a hard time keeping up with the exhaust. So you'd be out of the efficiency range of the turbo before you got 600' out. You might be able to run 8.90's with hot as hell inlet temps. As opposed to the Red car which has some pretty rediculously cold inlet temps. Stenod has had a couple customer cars that have had to switch to slightly larger turbo's in the 80 to 88mm range to get the efficiency range of the turbo back under control.

After that it just depends. The sky is the limit as to what sort of power could be produced.

[LTLHOMER]

LTL, your right on the 80mm Turbo deal, OSCA. Just trying to gte some info. I had always wanted to run T/S, but my stuff isn't allowed, Pontiac Pro Stock headed Big block. So might try something different.
As for the computer needing to be OEM, I couldn't tell you on that, that's why I was wondering about a blow-thru. Like a F1r blow-thru or the 80mm.
A buddy of mine bought a Rolex 24 hour race motor, LS1 with a bunch of 405hp Z06 stuff. Mostly stock OEM short, balance and blueprinted. Has the GM "HOT" cam and a set of Linginfelter ported OEM heads. When he bought it, it had a LSX intake and was "soposed" to dyno @ 526 on the motor, 346 inch.
Just wondered if maybe I should buy something like that for a few projects I would like to do. Maybe hit it with the 300 hit Nitrous. Was looking at putting it into like a 2700 lbs Chevy II.

So I gues what I'm saying is making the thing run 8's and be streetable. Just a little sideline I was thinking of. Also would like to do a 1955 Nomad with a "mild" LS1 and a 6 sp. for a daily driver. Maybe look at at GM crate style set up with the computer and everything needed. Thanks, John:cool:
Do v6's get a break in osca t/s? That would be the combo to mate to a 80mm turbo if you want to get the most out of the turbo. And like Derty said if you can get it light enough, you can make it fly with that turbo but I'm sure a turbo v8 comes in heavy...turbo v6 I don't know you tell me.

[qwiknotch]

Not too sure how fast it will go, but I am about to put a 636hp 402 LS1 with Dart heads, Victor Jr manifold and a carb into a 2800 lb Mustang.... On a small unit, it made right at 800hp and 700lb tq. That is still with a hydraulic roller cam and only 10.5 compression....

Eventually, I am going to get a better block and put some AFR 225's on it and a Super Victor with more nitrous.

As the engine sits (800hp) and 2800lbs, it should run in the 8's.

[jcracerx]

they specialize in LS , and flow technology

www.etheads.com (http://www.etheads.com)


:-Daw:rock:

[Suicidal Racing]

the best heads out right now are the L92 heads there sick and are the heads i would go with..send them to b.e.s and they would kill in n/a,jiuce or boosted form.

intake runners are 260cc and have a 1.59 exh and 2.16 int valve

heres ported ones
http://cgi.ebay.com/ebaymotors/Livernois-Motorsports-CNCd-Stage-2-L92-Heads_W0QQcmdZViewItemQQcategoryZ33617QQihZ020QQit emZ300076405803QQrdZ1QQsspagenameZWD1V

reg un ported ones..u will need the L76 intake though for them.
http://cgi.ebay.com/ebaymotors/L92-L76-Bare-Cylinder-Heads-LS2-LS7-LQ9-6-0-7-0_W0QQitemZ230158334896QQihZ013QQcategoryZ33617QQs sPageNameZWDVWQQrdZ1QQcmdZViewItem

[greatwhitess]

ET Heads are one of the best LSX heads available. The L92s are ok if you are on a budget but the exhaust flow sucks and there isn't enough room to put a big enough exhaust valve in them because they stuffed the biggest intake valve they could in them.

[Collinsautomotive]

You are very correct here. What you want to do with a 80mm turbo is really run a 5.3l motor. then procede to spin the piss out of it. Or run the 5.7 3.900 bore with a 4.8 crank and you get a slightly better bore stroke ratio. Either way small turbo and big cubes doe not equal fast ET's. Make the motor spin make some TQ with the turbo then gear it accordingly.

With an 80mm turbo, I don't see the car going very far into the 8's. And you'd want to keep the cubes down on a combo with a max 80mm turbo...stock cube would be more than enough...hell destroke the thing and it'd probably make more steam. A 408 would go slower than a 346 with a max 80mm turbo from what little I know about turbo stuff.

The red one is quite a machine and was sporting a big 94+ mm turbo...it might be a 101 I forget now.

And doesn't the OSCA (that's where the 80mm comes from right) require stock computer as well for fuel injection stuff? There's only a few guys that can manage with that in the sub 9-second zone, actually just one I know of.

[Collinsautomotive]

You are very correct here. What you want to do with a 80mm turbo is really run a 5.3l motor. then procede to spin the piss out of it. Or run the 5.7 3.900 bore with a 4.8 crank and you get a slightly better bore stroke ratio. Either way small turbo and big cubes doe not equal fast ET's. Make the motor spin make some TQ with the turbo then gear it accordingly.

a 4.8 crank in a ls1 block give you 311 cubes at 5.1 liters. For a turbo limited class car i would build this motor. You could just run a 4.8 or 5.3 block with eithe a 3.268 crank or a 3.668 crank. Would give you a 4.8 or a 5.3 respectively using the same block.

However I do not know how proven the 4.8 and 5.3 blocks are. you might want to do a bit of reasearch into who is doing what and how much power they are making. The word on the street however is that you can bore a 4.8 5.3 block from 3.77 to 3.898 and still have some meat left. This tells me that the cylinder walls have to be very thick. Good for making alot of boost. The smallish bore will help with cylinder head sealing as well.

Either way sounds like an interesting idea.

[qwiknotch]

I think with the old technology on turbos, that was true. I think an 80mm will go way into the 8's at 3300lbs. I have seen 400sbf's with 76's go 8.60's@3200

[Collinsautomotive]

Depends on Whose 80mm and what frame it is in. I can;t say I have seen a 76mm turbo goes 8's but the whole combo is unknown. I would tend to agree though that you can make alot more power with alot less turbo then is widely belived if the combo is well sorted.


I think with the old technology on turbos, that was true. I think an 80mm will go way into the 8's at 3300lbs. I have seen 400sbf's with 76's go 8.60's@3200

[GueSS Who ?]

LS1s are the shit. Very good effecient motors that make good power and torque with little to know mods. One of my buddies has a complete stock 6.0 out of an escalade with stock heads and cam. Has never taken any covers off the motor. Has a 350 dry shot with 60lb injectors and a LS6 intake with big headers. TH400 and 9in with 3.89 gears. Drives the car back and forth to work everyday.......Ran a very low 6 sec pass in the 1/8....Can't say what the number is because he street races the car alot but it went fast and it was on radials too.

see sig for my setup

[JL ws-6]

I have a 402, et heads, 13.5 to 1 compression, fast 90/90 setup, th400, car will go 10.5 all day long n/a and with a 100 shot ona Nos plate behind the TB it went 9.77 on a 100 shot, and a few 9.6x on a 150., and this was at 3500 lbs. Car will be 3250 for this season, hoping for 9.5 on a 100 hit.


To get into the 9's with a solid motor, you won't need anywhere near 300 hp of spray, not even 200.

If I wanted to run bottom 9's high 8's 300 would do it I'm sure.