Pimpium57

iTrader: (104)

Any of the heads/cam gurus have some input on which of these heads would work better with an MTI Stealth II - 224/220 .581/.581 116LSA? Will the 200cc runners on the PRCs work better with the smaller, reverse split cam, or will the better midlift #'s on the TFS's produce better results. My main concern is track time/ET, not peak rwhp. Also, I plan to do a Fast 90/90 at the same time.

I would consider AFRs as well, but remember seeing a post where Tony Mamo said that they didn't like reverse split cams.

Beast96Z

iTrader: (21)

The TFS heads have one of the best exaust ports on the market. That would be my choice with a reverse split cam.

big reg

iTrader: (28)

I am mulling the same thing over. I am getting ready to install a 232/230 .580 110LSA cam and was debating if the Terminators would be optimal for the reverse split cam I am using along with a ported Fast 90.

N4cer

iTrader: (11)

I'm considering the same. If I can save the money fast enough, it's Trickflow for me.

Pimpium57

iTrader: (104)

Like Beast96z said, I've heard alotta good things about the exhaust port on the Trickflows, but if it's only a matter a few rwhp, then the value of the PRC's come into play. OTOH, I have no problem forking over the extra cash if the more expensive TFS's will hands-down outperform them.....too many choices!

N4cer

iTrader: (11)

The Trickflows win on a very important factor: PTV clearance. They are on an 11 degree angle, and sit higher. That's good for big cams.

Pimpium57

iTrader: (104)

I'm not worried about PtV clearance.....with either head, I'll mill-down for the most compression on pump gas. I'd be looking for around a 59cc chamber.

Cobraeater

The Trickflow's valve angle is 13.5 degrees. The ETP heads are 11 degrees.

I would think the Trickflows make more hp over the Terminators just because of the valve angle alone, but both heads made similar power in the dyno section.

N4cer

iTrader: (11)

Aaaah yeah. Good catch on the valve angle. But you know, all we have with the Terminators is one person. That's not enough to make me believe that it's in the same league as the TFS heads. Although I AM considering both.

PREDATOR-Z

Reverse splits like high compression and good exhaust, so I feel compelled to throw TEA stage 1.5 in the mix.

Brian Tooley Racing

iTrader: (13)

For what its worth, we have used the smaller exhaust valves in LS1 heads for years and they don't seem sensitive to exhasut duration, header diameter, etc. I once had a customer with a LS1 head, 1.55 exhaust valves, and a 230/226 cam. He decided to go dual pattern, he kept the same intake lobe and just changed the exhaust so the new cam was 230/234 and once it was dyno'd and the graphs overlayed they said you could not see a difference anywhere in the power curve, they were identical.

I would think you would see the same results with the TFS head, since it has a smallish 1.57 exhaust valve and smallish exhaust port volume......I have no info on the Terminator head.