Re: Trick Flow 270 Heads
[Re: reknapp52]
#3230059
04/29/24 08:43 PM
04/29/24 08:43 PM
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Joined: Jan 2003
Posts: 31,203 Oregon
AndyF
I Win
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I Win
Joined: Jan 2003
Posts: 31,203
Oregon
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The most power I made on that 470 was 775 hp with the TF270 heads. That was with flat top pistons and pump gas. To pick up the extra power I switched over to a Wilson ported Indy intake. The OOTB Indy intake didn't work all that great but once Wilson worked it over it made really nice power. Cost a ton of money but that is how it goes. We ditched the dry sump system and switched to a wet sump setup using a high end Moroso pan and an external belt driven oil pump. The oil pump has a vacuum pump mounted on the rear of it so they were both driven by the same belt. Kind of a cool setup but once again, kind of expensive. Anyway, with the vacuum cranked up to 15 inches the engine hit 775 hp which is pretty good for those heads. We built a drag race 505 with the TF270 heads. Big roller cam, high compression, etc. but it didn't make as much power as my pump gas 470. Not sure why, probably because the camshaft wasn't "perfect". I did a fair amount of camshaft testing with the TF heads and they are picky about what they want. Duane can steer you in the right direction if you decide to use TF heads. https://www.motortrend.com/articles/dyno-tested-vacuum-pump-help-engine-make-power/
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Re: Trick Flow 270 Heads
[Re: reknapp52]
#3230439
05/01/24 10:38 AM
05/01/24 10:38 AM
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Joined: Jan 2003
Posts: 14,539 So. Burlington, Vt.
fast68plymouth
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 14,539
So. Burlington, Vt.
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I don’t understand the questions……..TF 270’s don’t require rockers with additional offset.
In the same way MW Indy EZ’s and SR’s don’t.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: Trick Flow 270 Heads
[Re: fast68plymouth]
#3230443
05/01/24 11:18 AM
05/01/24 11:18 AM
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Joined: Jan 2003
Posts: 9,924 Weddington, N.C.
Streetwize
master
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master
Joined: Jan 2003
Posts: 9,924
Weddington, N.C.
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Not really a question, just wondering how they seem to get ~360CFM so easily.
But I haven't seen the ports up close so wondering how they get the same flow numbers that used to Take an Offset rocker to get. I would liken the TF270's to compare more to an Indy -1 than the non-offset rockers in terms of flow.
Can an EZ-1 flow on par with them with porting these days...affordably?
it seems like they must corner the market just on the bolt-on savings of not needing special Rocker gear alone.
If i could get those flow numbers almost 20 yrs ago (when I built mine) without special dog leg Intake rockers and also have a straighter angle between the Lifter and Rocker...I sure would have at least considered them.
I've been out of the BB stuff (not out just paying a lot less attention to it) for a while, just trying to get back acclimated.
Last edited by Streetwize; 05/01/24 11:18 AM.
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Re: Trick Flow 270 Heads
[Re: Streetwize]
#3230490
05/01/24 01:51 PM
05/01/24 01:51 PM
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Joined: Jan 2003
Posts: 14,539 So. Burlington, Vt.
fast68plymouth
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 14,539
So. Burlington, Vt.
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EZ295’s and SR295’s can both flow 360 with a decent valve job and some minor tweaking. I’ve also hand ported both into that flow range. Std rockers.
As for cost, nothing gets that close in flow for what the 270’s cost.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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