LT1 bolt on record????

[NJSPEEDER]

i was looking into the worl dof LT1's in more detail recently and i was wondering what experience you guys have with bolt on mods. what works,?what doesn't? what are good starting points?
the record, from what i can find, is standing at 11.8 @ 114 mph, that doesn't seem like a terribly hard goal to hit for someone who is motivated and has some time to do a little development work.
i don't even know what an average 4.1 gen weighs, anybody care to clue me in?

[j0n]

11.8 is the record...shon herron holds it. My vert full weight with no jack and spare was something near 3600lbs iirc

edit: the record is more than attainable, seeing as how i went 12.700 @ 107.x at that weight with almost stock suspension, a generic mail-order tune, mechanical water pump, on randys 3 yr old drag radials

edit #2: i was also running stock stamped steel rockers plus the motor/valvesprings had 100k miles on em

[Pampered-Z]

When the term "bolt on" is used are you talking about rebuilt motor as well? I seen the NHRA "stockers" go lower then 11.8. Think that was a 96 Z28, and ProjectZ28 went 11.9 on a street driver with just a 305 cam.

Just using stock internals you could probably get to around 325HP if you get creative. 1.7 rockers, Impalla head gaskets.

There are allot of ways to cut weight out of the car as well.

Then you just need the right tire/gear

[NJSPEEDER]

for an N/A bolt on car, i see most people apply the rule of only changing parts that no oil hits. so basically, intake manifold, head gaskets, and rockers would be out.
i sawa little info about herron's car. he has it listed at 3100lbs. i think that would be an easy number to hit.
his car is also an M6, if someone was to go after the record with an auto they would be at a huge advantage off the line i would think. stick will trap a touch higher, but through the first half of the track an auto with a shift kit and the right stall would be way quicker.

[j0n]

i thought shon's car was an automatic...

[NJSPEEDER]

his sig on LS1Tech lists it as a M6, 1.57 short time with a stick car is impressive.
he trapped at 114mph, doing the math for a 3100lbs car it would mean he is putting around 335ish to the wheels. not too bad

[Mike]

intake manifolds are permitted per ls1techs description of the rules.....

[j0n]

intake manifolds are permitted per ls1techs description of the rules.....

only thing to gain by touching the intake manifold on an lt1 is opening up the throttle body area to allow for a 58mm or larger throttle body

[Pampered-Z]

only thing to gain by touching the intake manifold on an lt1 is opening up the throttle body area to allow for a 58mm or larger throttle body


Actually there are a few SECRET tricks! :wink:

[j0n]

ORLY?

[12secondv6]

Actually there are a few SECRET tricks! :wink:


Like?

[NJSPEEDER]

i have already thought of several little things that i have not heard of anyone trying yet. :)

[Jersey_TA]

Why strip out wieght when you could just get a nice H/C combo and not have to worry about people calling your car a tin can.:-?

[12secondv6]

It would just take someone who is very familiar w/ drag racing and weight redux knowledge etc.

Where can we find one of them??

[Jersey_TA]

It would just take someone who is very familiar w/ drag racing and weight redux knowledge etc.

Where can we find one of them??

LOL hmmmm

[NJSPEEDER]

you don't have to make a car a tin can to make it weigh less. my 91 RS weighed 3280 with 3/4 tank of gas and my fat butt in it, and every power feature on teh car was still intact and fundtional and the interior was all there except for the rear seats.
you can also drop a few hundred lbs from a car for free, compare that to the thousands that a good H/C set up costs.

[Jersey_TA]

you don't have to make a car a tin can to make it weigh less. my 91 RS weighed 3280 with 3/4 tank of gas and my fat butt in it, and every power feature on teh car was still intact and fundtional and the interior was all there except for the rear seats.
you can also drop a few hundred lbs from a car for free, compare that to the thousands that a good H/C set up costs.

I'd rather have the H/C. What did you pull out to get it to weigh that, and what was the stock weight?

[Tru2Chevy]

intake manifolds are permitted per ls1techs description of the rules.....

Yes, but that's because oil doesn't touch an LS1 intake like it does in a gen 1 sbc or LT1...

- Justin

[NJSPEEDER]

I'd rather have the H/C. What did you pull out to get it to weigh that, and what was the stock weight?

not that the H/C package wouldn't be a ncie thing, but not everyone has the coin sitting around to buy one, so an altrnative method needs to be presented.

when i started the tim-fast diet plan the car scaled jsut a touch under 3600lbs on e-towns scales with a very full gas tank(filled up about a mile from the track).
i pulled out some little thing here and there, nothing special. i guess it just adds up :twisted: hehe
there was also no cutting/hacking invovled in any of the removals. simple unbolting/unplugging of unused items with in the car is all it takes.

[Jersey_TA]

when i started the tim-fast diet plan the car scaled jsut a touch under 3600lbs on e-towns scales with a very full gas tank(filled up about a mile from the track).
i pulled out some little thing here and there, nothing special. i guess it just adds up :twisted: hehe
there was also no cutting/hacking invovled in any of the removals. simple unbolting/unplugging of unused items with in the car is all it takes.

True, it does add up, but you still didn't answer my question ;)

[NJSPEEDER]

you picked up on that pretty quick rob :wink:
there are certainthing i keep to myself about my methods. i will say that i believe in full appearing interiors. the choice of how many or how few ceature comforts remain intact is up to the car owner. if you feel like getting that fireturd of doom down to weight shoot me a PM or something and we can get together to make a game plan.

[Batman]

should have bought my 84....3185 with me and a 1/4 tank, and that is the way it rolled off the factory floor!

[12secondv6]

LOL hmmmm

:rofl: :rofl:

[NJSPEEDER]

james = weight redux hacker :p

[Jersey_TA]

you picked up on that pretty quick rob :wink:
there are certainthing i keep to myself about my methods. i will say that i believe in full appearing interiors. the choice of how many or how few ceature comforts remain intact is up to the car owner. if you feel like getting that fireturd of doom down to weight shoot me a PM or something and we can get together to make a game plan.

I understand lol. I know a bunch of weight I can trim off, but I'd rather just keep it as is.

[WayFast84]

does this lt1 car have to be streetable?

also where do you guys go weigh your car?

[j0n]

also where do you guys go weigh your car?

both atco and englishtown have scales that you can put your car on after making a pass

[WayFast84]

damn, you actually have to make a pass?..

[j0n]

just worry about getting a car that runs and drives, then worry about getting your license...and once those two are accomplished THEN worry about what the car weighs

[NJSPEEDER]

does this lt1 car have to be streetable?

you can remove a bunch of weight and still maintain all of the typical "street" comfort features of the car. you jsut have to know where to look.
i woudl guess that there is at least 200lbs in the average f-body that can vanish without any noticable change in the ride or comfort of the car. you jsut have to know where to look.

[Knipps]

you can remove a bunch of weight and still maintain all of the typical "street" comfort features of the car. you jsut have to know where to look.
i woudl guess that there is at least 200lbs in the average f-body that can vanish without any noticable change in the ride or comfort of the car. you jsut have to know where to look.

but does that include safety? ;)

[Jersey_TA]

weld rims drop off a bunch

[NJSPEEDER]

but does that include safety? ;)

i don't pull safety equipment off of daily/regularly driven street cars.

[Pampered-Z]

Without cutting out saftey equip line the bumpers and door panel supports. You could still remove allot of weight of unneeded stuff like AC, emmisions, power accessory, ect. Then going with lighter then stock parts; seats, K-member ect. Now this might borderline saftey maybe replacing the stock airbag steering wheel with aftermarket?

I thin the key to resetting the record is going to be in the first 1/8 mile. Big HP or MPH is going to be tuff. there simply comes a point that spinning the engine higher isn't going to make more HP.

Where are the rules at? i'd really like to look at them!

[NJSPEEDER]

the N/A bolt on stuff is pretty simple. TB, exhaust, water pumps, and tuning are legal to modify. also, any and all weight reduction, drivetrain, and suspension mods are allowable.
with the record where it is now, i can't see why it can't be much faster without doing anything crazy or losing any of the power accesaries the car came with.

[WayFast84]

i guess I will have to get an lt1 car, next year and we can go for a record :)

[1SlowFormula]

Sorry to butt in guys, but I'm new over here and this thread struck a chord since I am going for this record myself. I have spoken to Shon a few times and there is nothing really special about it, as most others have stated the big thing is weight reduction. I hope to beat the record this fall of maybe next spring since I have to wait for the weather to cooperate and cool off...

My reaceweight is 3190, and it should go down a little more before the fall, plus I still have a little more tweeking to my setup to get in line before then, but it should be fun... :wink:

[1SlowFormula]

Without cutting out saftey equip line the bumpers and door panel supports. You could still remove allot of weight of unneeded stuff like AC, emmisions, power accessory, ect. Then going with lighter then stock parts; seats, K-member ect. Now this might borderline saftey maybe replacing the stock airbag steering wheel with aftermarket?

I thin the key to resetting the record is going to be in the first 1/8 mile. Big HP or MPH is going to be tuff. there simply comes a point that spinning the engine higher isn't going to make more HP.

Where are the rules at? i'd really like to look at them!

I will look for the posted rules, but it all stems back to a few different events where Bolt-on cars would race heads up, and the rules for bolt-on were nothing that touched oil, but since a lot of guys were swapping in 1.6 rockers there was an exception made for rocker arms. so basically anything can be changed on the car, but the motor needs to be stock except you can run 1.6 rockers and replacement valve springs. There is no limit on tranny, rear, streetability, etc...

If I recall a lot of the confirmation is based on vacuum level at idle, I think it needs to be over 18# or more vacuum too. I don't have to worry about that since I know mine motor is all stock...

[98tadriver]

I understand lol. I know a bunch of weight I can trim off, but I'd rather just keep it as is.


:lol: thats what i said last year... finally 1 year later i give in! now look where im at, stock internals as well. granted when i go to the track, theres only a drivers seat, my a pillars, doors and most of my dash inside, but its one of the best free mods out there! and to think, theres 160 more lbs that im taking out for next time!

[NJSPEEDER]

i was looking at an LT1 car when i started this thread. still wish i had gotten it, but things didn't work out. i talked to herron about his record and he was pretty cool.
personaly, i think the LT1 bolt on record is a bit soft. with some common sense while doing prep, i can see at least half a second coming off of it without spending a billion dollars or doing anything too nuts.

[98tadriver]

i was looking at an LT1 car when i started this thread. still wish i had gotten it, but things didn't work out. i talked to herron about his record and he was pretty cool.
personaly, i think the LT1 bolt on record is a bit soft. with some common sense while doing prep, i can see at least half a second coming off of it without spending a billion dollars or doing anything too nuts.

:orlyflag:

[SteveR]

there are tons of tricks for the LT1. I've seen some pretty creative engineering. 11.8 does sound a bit high. There used to be a company that made light weight body panels for the 4.1 gen Camaro, but I dont think they are around anymore.