Built LT1

iTrader: (3)

How many LT1/4 motors are out there that are making 500+ to the wheel N/A? How many are street driven on pump gas?

I think Ed Wright, Rick Abare, and Jeff Creech (Carolina Automasters) all have 500+ N/A motors.

Speed Density

iTrader: (38)

And none of those are street driven.

To make that kind of power N/A threw and LT1 and opt to drive it on the street is really going to be hard to achieve. You have to give up a lot to gain a little.


Tony.

Revelation Z28

iTrader: (10)

full LE4 setup on a 396?

speed_demon24

iTrader: (6)

A stock bottom end LS1 with TEA/AFR/ETP heads should get you there with the right combo and still be streetable.

FASTFATBOY

iTrader: (23)

I would think you will have to enter the realm I have entered to achieve 500RWHP and street drive...which is where I am hoping to go. It is easier with a six speed.

Bring your wallet, all the supporting hardware, not to mention the engine...is gonna hurt and hurt BAD.


I driven my car around to break it in.....every DIME was worth it...it's fawkin COOL!


David

zigroid

iTrader: (22)

convert GOOD sbc heads over and run a single plane intake, these will help.

I asked lloyd a similar question a year ago. that was his answer.

also run a 10 bolt w/ 3.42s and an aluminum driveshaft. that'll help too!

Revelation Z28

iTrader: (10)

i was just guessing.

Speed Density

iTrader: (38)

Everything is easier when its M6+10bolt.

It can happen, just isnt likely on something that needs to retain 'streetability'.

Tony.

pharmd

iTrader: (4)

SS Aleks car made 480rwhp on a 355 mild SR that was streetable. He destroyed his rear at the strip, but with more tuning he may be even closer to 500. He is running the AI heads and custom cam. He may chime in on this, but I think it is possible, but it'll cost ya.

jasonisdn

iTrader: (1)

i agree and he is only running ai's 200 cc head, factory castings of course. when i talked to phill about alex's cam, he said it was small for a SR (can't give out specs, sorry).

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OutlawZ

iTrader: (4)

well you're looking at a few things....

solid roller
big heads (AFR 220's or 227's at a minimum or SBC converted heads) that flow 300+
most likely shaft rockers
single plane conversion

just that right there will cost you..... it's not going to be cheap that is for sure. Tony Shepherd's car also did over 500RWHP NA. My build is VERY similar to his motor.... I'm expecting in the 515-525 RWHP range NA.... But it wasn't cheap at all... Along the lines of 15,000 for the whole motor.....

jasonisdn

iTrader: (1)

since i can't post the link to the proof , i quess i can cut and paste the info without any issues?

Aleks' NA 355 LT1 - 480rwhp/419rwtq SAE - Aleks asked for a topend to transform his over-bore rebuild into a weapon and the numbers speak for themselves. With a much fatter torque curve than most strokers this is one hot 355. His setup consists of the same 200cc CNC LT1's & Street/Strip Ported LT1 Manifold Rick Abare uses to break records. With a very drivable solid roller setup this car is sure to get some attention prowling the streets & at the track. On its initial outing, inlet restricted to 450rwhp, this full weight M6 car with full accessories (A/C, Power Steering, stereo, subs, etc.) went low 11's in street trim. Updates as soon as Aleks dials in the tune & replaces the 12-bolt he mangled. Expect extremely low 11's at worst & over 400rwtq by 3500rpm.

and if you go look you can see the dyno graphs

engineermike

Just an example. . . a local guy has a 396 LT4 with AFR 220 Competition heads, 12/1 compression, SP conversion, and a lumpy solid roller over 250 at .050. He made 480 rwhp.

Mike

FASTFATBOY

iTrader: (23)

6 Speed or auto???


David

engineermike

I believe it was a 6 speed.

Mike

Speed Density

iTrader: (38)

That car sounds like a bit of a turd.

Tony.

engineermike

Say what you will, but I can assure you that it was a quality build by a highly respected shop. The heads were flowed and they broke 300 cfm. Everything was checked, top quality machine work, fully tuned, etc. . . Here is a thread where he posted his dyno results with an LT4 intake versus the SP:

https://ls1tech.com/forums/showthrea...t=single+plane

Correction, it's a 383 and it made 485 rwhp.

Mike

Speed Density

iTrader: (38)

Ah, its Turbo_6's car. Very very clean ride.

I retract my last statement.

To the OP, are you talking about driving on the street once in a while? Or lots of street miles?

Tony.

OutlawZ

iTrader: (4)

I have respect for anybody that approaches 500RWHP with an LT1.... But keep this in mind when you are looking to truly being impressed with a 500RWHP LT1.....

Doing with a manual is ENTIRELY different than doing it with a TH400, big stall converter, 9" rearend, etc..... My 355 NA dynoed at 422RWHP with the T56. I removed the manual, put in the Th400 and dynoed it and got 375 RWHP with no other changes......

So realistically from a manual to Th400 swap you're talking 50 rear wheel hp lost.... so for someone to break the 500 mark with a Th400 and high stall converter is WAY different than someone doing it with a stick....

When I'm looking to be truly astounded by dyno #'s I look to cars like Ed Wrights (cause he's doing it with LT4 castings and a TH400 and Tony Shepherds cause he's doing it with all the stuff above.... A stick car making 500 at the wheels is like 600 at the motor. A TH400/high stall car making 500 at the wheels is more like 680 at the motor..... Dyno #'s are not all created equal...

RickyMartinZ28

iTrader: (5)

If you add all mine up I've got $15k in my lt1 and trans and I'm getting 487 hp and 524 ft/lbs to the rear wheels. Bore and stroke, machined intake, custom valvetrain, etc etc... all high quality and I've got 80,000 miles on it and nothing has broke YET, but I rarely romp it, but when I, its so worth it. The bottom end was built to handle a 250 shot of nos that I've yet to install, haven't really found the need to.

Well I did destroy my first set of lifters... compcams lifters got mashed to hell by my springs, lol (3000 miles and they were shot)

Most all my cost was Machine Work and custom parts. I've got more money invested in my valvetrain than most ricers do in their entire car.

Good thing my dad build race engines, lol. That helped with the cost.

PM me if you need some details