do they have similar flow potenials?

how about port velocity for each, who's better?

i'm thinking of these AFR heads 210cc, 220cc, 227cc, 215cc RR? can i hit 320+ cfm with AFR heads ported by GTP?

can i reach the rwhp numbers the LS1's are doing with ported AFR heads and hence getting similar 1/4 mile time and mph?

 

Well IMO, there's no sense in comparing the two b/c theyre compltely different. Port shape, spacing, valve angle, etc. is all superior on the LSx. Port velocity is going to be dependant upon min crossectional.. so it varies depending on what you do.

You asked about the LS6's.. well I'm a big fan of them... we've gotten 340peak on our bench w/o welding/epoxy... & ended up easily breaking 600hp on pumpgas... so theyre pretty amazing for a production head.

Really, forget about the LSx stuff if your project car is an LT1 ride, b/c it's just going to upset you .

There's always someone faster... Guys used to make 600hp all day long with a 358 and raised runner bowties... it just depends on what you're trying to do. How fast do you want to go, how much power do you want to make, what do you have to work with (car setup), etc.

 

i want to dip deep in the 9's @ 150+ mph
i know some had done that with a vortech YS-trim supercharger and a 383 LT1. how do i assure i will get the same results if i do the same mods?

by the way i can swap a LS1 into my 94 Z28 and keep every thing working. but i'm figuring if i can hit my 1/4 mile goal with the LT1 it will be easier.

 

How much does your Z weigh? We know that a 3,900# 30th SS Convert can run 9.04@155 with a Vortech blown 383, factory 4-bolt LT1 block, custom Canfield heads. In a 3,400# car you would be looking at 8.6-8.7's with the same engine. The technology is no deep, dark secret. Call Second Street Speed in Perkasie, PA and ask them to build you an identical engine. They willl quote you a price, including a "design fee" for George Baxter, air freight to Kuwait and of course my commission .

I'm not kidding... we were just talking about this last Sunday.

 

Might as well try and snag a set of Dominion heads if you're doing all that then.

 

Based purely on flowbench numbers alone (which don't tell the whole story, of course), it seems that the LS1/6 heads produce great peak numbers, but especially spectacular lower-lift numbers. With reference to Phil's comments, I do indeed get upset whenever seeing what people are doing with LSx heads

On the other hand, there's plenty of good heads out there for the LT1, if you're willing to modify some GenI SBC heads to fit. I've thought about it for my motor, but I'm not willing to spin it fast enough to take advantage of some of the big-port offerings out there. If I had more bore and less stroke (or a motor that I wanted to rebuild on a regular basis), it'd be a different story.

 

Exactly Eric... I've stared at sets of 18deg/sb2.2's for so long.. I want to do it, but I know that it just isnt feasible for me at this point in time. I cant afford $3000 worth of exhaust, FAST, & even with discounts.. the valvetrain cost alone would pay for nearly a year of school. D'oh.. maybe someday

Abdullah... IMO, you've gotta decide how you want to go about running X.XX. It sounds like you're talking about forced induction.. in which case I think a killer set of AFR's, a stout shortblock, and plenty of boost will satisfy you.

Fred... design fees.. that rocks.. I don't want to know how much $ he's spent swapping parts & setups. It seems that people just dont realize the amount of money and time that goes into building a car like that. I grin like a 14yr old stumbling across dads playboys whenever I see Baxter's videos, especially the one AFTER the suspension was properly setup .

-Phil

 

Put the lotion in the basket!!!!

Mike

 

IT PUTS THE LOTION ON ITS SKIN!

IT DOES WHAT ITS TOLD!!!

Okay.. I suppose we'll stop before this thread is bastardized like so many others.

-Phil

 

The other big question arises... what about the YS-trim? People have been running the Novi 2000 for just 8psi on cprastangs.....why not the YS trim with more flow potential than the T? bigger inlet and discharge etc.??? Wouldnt it be more efficient at 8-15 psi than a T trim? Will it require less power to run those psi for it being a bit bigger????