im curious as to the details of the 660rwhp NA setup?
jesse

 

last night we got the motor ready to pull. we should be taking it down to the machine shop either tomorrow or monday.

anyhow, i can only tell you what i rode in, and can only tell you the dyno sheet i saw. anyways, the machine shop knows ray, so we are trying to get the car in and out. if everything goes as planed the engine and all should be done by some time next month. when i get my dynoed either way, 580 (denver) or how you guys plan it to come out.

i guess thinking about it, it really doesnt matter to me either way. what we are doing, and what ive seen other people getm there will be no less that 450. then the 150 shot on top of that.

also on the injectors, the 96z i rode in had 30# injectors, but i have heard that the high alt allows them to run easier. i want injectors that will run here or in cali, so just wanted to ask around

also when all is done i will post what is in the car

 

Ya know...660rwhp....450rwhp, same thing!

 

only one thing i want to know.... WHERE DO YOU GUYS GET ALL THE MONEY FOR THIS.... IM SO JEALOUS....... just playing

 

all what money? it fell out a a tree!

anyways, no 660 and 450 are not the same. but im telling you the car i rode in (96z28) was dynoed at 660. but you guys dont seem to think its possible. what i meant by 450, is that i would be happy either way. but i dont see 450 in my future

 

I just thought of another example: SUPR dirt track motors. The rules are:

- 350 cid
- flat top piston
- 23 degree standard port location head
- 2.02/1.60 valves
- any intake
- single Holley 4 barrel carb (not a Dominator)
- unlimited lift and duration solid roller cam

What you're left with is a pretty standard low-budget, medium compression, high performance V-8, not too dissimalar than our LT1's.

When the class first started, most engines were making around 570 - 580 hp at the crank. After a year of tinkering on the dyno and playing with the machine work (trick full-radius valve jobs, angle mill to 22 degrees, low tension rings, piston-head clearances of <.020", extremely aggresive ramp cams, etc. . .), one engine builder managed to achieve 670 hp at the crank.

Don't NASCAR (the pinnacle of SBC technology) motors make 750 - 800 hp at the crank?



But back to the main subject, you probably can't go wrong with some 42 lb'ers. They idle and drive like stock, don't require low-impedence converters, and will support a butt-load of NA hp. They can be had for ~350 new and $200 used. In fact, I'm selling a set right now.

Mike

 

I'm relatively familiar with George Baxter's 1,125HP Vortech S/C'd 383 LT1. Without the blower, it only made about 550flywheelHP.

I am familiar with a fairly exotic nitrous motor that was built from George's old parts. It has made over 630flywheelHP N/A, but there is no way with additional tuning it will make another 100HP. And it is way past the ragged edge for streetability, with a cam that will barely idle and a compression ratio that is going to require leaded race gas without the N2O. And niether of these engines was running "LT4 heads"...... they are not big enough for 600+ flywheel.

With the HP levels you are talking about, you are going to need 83# low impedance injectors. What ECU are you going to use, or are you sticking with the stock PCM?

We will see..... keep us up to date.

 

That is NOT sooo true!!! Every ricer "racer wannabe" runs that much horsepower on their Moms 4 bangers Honda Civics!! Oh an they do have the "stickers" to prove it

 

As far as 660hp being impossible...just check out Morgan Motorsports....i think they made a 427 stroker kit with over 700hp..i think it was N/A (not 100% sure) but it was also in an issue of GMHTP

 

700 fwhp NA: Perhaps.

700 rwhp NA: Not gonna' happen.

Mike

 

i would take 700 flywheel hp. i honestly have no idea how he is going to pull it off. there has been the discussion that the lt4 heads i have might not cut it, so if you are looking for some new stuff, i might be selling the heads on here. the block is ready to come, all that it holding it in the car right now are screwdrivers through the motor mount.

from my experiences with the car so far (one of my stipulations on the job was i wanted to see what was going on and help) these cars are not the monster everyone talks about. Yes there is some BS that we have had to deal with, but its nothing like i expected. i am looking at getting a camera when i go down next for some nice pics of what a pile of **** my motor was. from the looks of things the motor has had extensive work done to it by cleatus and/or claude. so there will be a lot to do. i am going to be taking the enginewell down to nothing so we can ppg the inside black, then do the entire undercarage with a rubberized undercarage coating.

 

LT4 heads aint gonna cut it, not sure how that is even up for discussion? You are talking some SB2.2 nascar heads or some of the other low degree GM performance stuff.

Bottom line: It's going to take HUGE heads which will kill yout part throttle response and low end, a HUGE solid roller that will probably have to idle at 1500 as someone else said, aftermarket computer cause theres no way you will make that hp on a 7000 rpm limit, race gas.

By that time you should be getting rid of the LT1 and putting a big block in it.

Like the others said, i think he showed you the graph on nitrous.

 

Now that I have a BMR K-member and Hooker LT headers, mine has become an absolute cinch to work on. I pulled out a piston in 4 hours the other day. I can change plugs in about 20 minutes.

Mike

 

No one said 660 horsepower was impossible. My engine will be in that range just with a working ignition. 660 RWHP, on the other hand, is a whole different ball game.

I'd hope they could with C5-R heads and another 30 cubic inches of displacement. However, that's still not 660 RWHP...

You can make 700+ NA horsepower with an LT1, but it won't be anything you want to drive down the street and forget filling up at the local gas station.

 

Actually my bad.....it wasn't Morgan Motorsports...its actually More Performance that built the 700hp 427 stroker....and i think it only cost about 25 grand