I went through the old thread and it seemed like jimlab had the highest NA numbers which was started almost 9 months ago. Mindgame has since made some rediculous numbers, Jordan did 477 and Jason Short was in or around that area also. Has anyone hit or come close to 500rwhp NA since? SStrokerAce and I have been discussing some stuff to possibly get up within the 475+rwhp area this winter.

Has anyone done anything new since? I know Jason Short is working on something wicked.

 

I havent gotten my stuff together yet.. as i havent finished the heads/intake really.. that and I havent decided on lobes... but my lil stock displacement, LT1 topend, HR engine w/ a stock PCM might upset some people . Suppose we'll have to wait and see for sure .

As far as 500 NA w/ aftermarket castings, solid roller setups & more inches... I think we should see more than we do .

 

I have been thinking about trying to do this. I am still deciding on winter projects and this is one of them. After seeing your motor do what it did with TEAs LT4 heads, I think it is more then possible with maybe a set of TEA or other ported AFRs. I was thinking about having some 210s worked on. I figured you need about 300cfm while still mantaining good low lift #s. I know that TEAs 190 AFRs, for sbc, someone has flowed 295@.6, so I dont think its is out of the question.

I am looking more at 500rwhp and 450rwtq.

 

This isn't meant to be a smart comment at all .

Why do you think the numbers are where they have been and not more? Some of the guys that are porting the heads/specing out the cams are reputable guys. I would think that if it was easy as some say it is it would be done by now...don't you?

Then again, maybe people are porting LT1 heads with their face buried in a "How to Port LS1 Heads" magazine .

Ryan

 

i am on a mission for a 700 - 750 hp 386,short blocks done havent decide on heads &cam yet.this should put 550-600 on the ground.
i am planning on this on the motor then add n20.500 hp 383s are common i am heading the top,no hold barred.

thinking about building a sheetmetal intake ?

will be one bad lt-1

 

trying to keep this up top

 

A true accomplishment is a NA 350ci ported stock LT1 topend/HR hitting 500rwhp. Good luck Phil

Brad

 

I really think putting wether an A4 or M6 around those #'s has bearing.

 

Exactly!

At the 500flywheelHP level, my M6 losses were 12.6%, meaning it would take 572flywheelHP to make 500rwHP. With the loose, high stall, non-locking convertor, the same setup with a TH400 had 21.5% lossed. Meaning it would take 637flywheelHP to make 500rwHP.

 

i remember awhile back that either mindgame or phil or someone was hinting at something about lighter valvetrain components that would result in more power for LT1s

was i smoking crack or did you guys really say something like that?

 

Well, it wasnt' me but Definitly yes.

You will gain because there is less mass to accelerate and at engine speeds there is a large gain compared to static mass on the car.

You also gain stability at high rpms. The Z06 went to salt(not table salt, can't remember what the compound was though) filled valves to lighten up the valvetrain and the spring pressure required to keep the lifter on the cam lobe. I think maybe the LT4 had the same type technology? not sure though.

For most people though (ooking for around 400rwhp) it is not at all cost effective and your going to possibly comprimise some longevity. As you start to push the envelope more though you have to start pulling out the stops on the bank book and go for the exotic expensive light stuff.

 

I used to think the same thing, but look back to 1996 or 1997. There were guys with ported heads and cam making 330 rwhp and thinking it was awesome. A supercharged car was looking good at 350 rwhp. Things change. I think everyone needed a wakeup call, and the LS1 was it.

 

Seems like 400rwhp (M6) LT1 hds/cam combos are more the exception than the rule. Also, it seems like the 400rwhp mark has been "it" for the past 3-4 years.

All I want to do is trap 120 @ my 3550 raceweight. ET be damned! :-)

Ryan

 

I would LOVE to see a 500rwhp hydrolic roller using non-exotic heads.

 

I would LOVE to HAVE a 500rwhp hydrolic roller using non-exotic heads.

hahhaha