Tony Shepherd

iTrader: (4)

I need some feedback on the Trickflow 21* heads. Some of us organizers are saying allow them and some say do not. On one hand it is only 2* which you can actually angle mill your stock heads to 21* and have the same thing so why not allow them? On the other hand...if we allow the trickflows other racers may ask.." you allowed those 21* heads why not my 18* Brodix.......etc". I know some street cars will have these bolt-on 21* Trickflows on their car.....we can't put them in Outlaw now can we? Get my drift????????? What do we do here? Allow them in Extreme Street and Modified...or not?

1badzee

iTrader: (12)

Is anyone running an 18* head in Outlaw? Just set the max at a 21* overall... Like you said, the factory heads can be angle milled to 21* anyway.

AChotrod

iTrader: (17)

I havent researched tham that much, but atleast let them in Mod.
I actually dont think any aftermarket head should be allowed in the EX classes, although I know others disagree with that.

So Im fine with it. If you can run AFR227s and a 408 w a SR then why not the TFS 21* heads.

JoeliusZ28

iTrader: (2)

227s will out perform them anyway, they are only a 185cc runner.

AChotrod

iTrader: (17)

Thats why I said let them in all classes. You can run a way more nasty combo and still be legal.

Tony Shepherd

iTrader: (4)

I agree. I think we should allow them . From what I remember the flow numbers where decent but will not outflow 23* AFR 227's. They may be comparable to the 195 and 210's. I will mention that to the others.

kgkern01

iTrader: (10)

Here are the flow specs as cast on the 21* TFS heads from Trickflow: https://ls1tech.com/forums/10495801-post26.html

As I recall AI claims getting nearly identical results when they flow tested the heads as cast as well.

1badzee

iTrader: (12)

Are you guys still going to discuss it or was the final verdict posted in here already?

Tony Shepherd

iTrader: (4)

Still discussing.

TravisMcGill2000

iTrader: (2)

i vote to let them run. but im also one of the ppl going to be using them.lol

1993 z28 f1

iTrader: (6)

Hey:

I say allow them in both ex and mod, I doubt they will make much difference on the cars that have them, than the other choices that are out there. It takes a lot more than a 2 degree head diff to make a significant advantage on something you can do to a stock head, 18* are a whole different story. Good luck on your choice hopefully it makes the most folks happy whatever way you choose.

Dub

When In Doubt Do Without

OutlawZ

iTrader: (4)

I say allow them.... 227's will kill them anyways..... hell allow them in outlaw!!!! if you're using them in Outlaw and you are competitive you deserve a trophy...

Puck

iTrader: (17)

.

I see no problem with allowing the 21* TFS heads - the big lure of them is for mild builds keeping CR up anyway, as a kind of bolt-on deal. I would imagine most of the really serious builds will be using max ported AFRs or converted SBC stuff anyway.

Colin91Z

iTrader: (9)

I say allow them. I mean afterall, they are a bolt-on LT1 specific head, and I don't see 2* making an unfair advantage over other LTx specific offerings that would be found on cars that qualify for EX street or Mod classes.

If someone wants to argue about the 18* heads, simply put, they are not a bolt-on deal AFAIK. Heads like that belong in Outlaw IMO.

95 Formula

iTrader: (2)

I say allow them but discuss if your gonna put a weight penalty on them or not. I'm really feeling like an underdog running gm lt4 heads with all this talk of 21 deg heads, 227s, etc...ha..

1 Craz28

What about the little guys like me who have'nt taken there heads off yet?

95 Formula

iTrader: (2)

extreme NA is there for the taking. I def. think these heads(21 deg) should be for Modified and above only.

JoeliusZ28

iTrader: (2)

whys that? Id like to see them in the street extreme class too, even if at a penalty. I plan on running them in the future but my car will never be a 9 second drag car. Mid 11s is about as fast as im ever gonna go.

taner

iTrader: (6)

i agree with Tim. mod. i don't think it is fair to the extreme guys. i mean if you are buying tfs heads, aren't you going to have them at least cleaned up prior to installing them? and they are 21 degrees.

you asked i answered.

95 Formula

iTrader: (2)

For the simple reason that the line has to be drawn somewhere. If not then why not let converted intake cars in if they meet all the other rules, why not let 3 speed trannys in if they meet all the other rules. There simply needs to be a "breaking point" where you have to move to the next class. Honestly, you can easily hit your goals without having to go that that head anyway.