How many here run AFR 165's on 306's?

NKau

NKau

Founding Member
Dec 15, 2001
1,346
0
37
Jefferson, WI
#1
Am curious how many people on here run these heads on primarily street oriented engines that see some strip action. I'm dead set on keeping my cam (.499"/.510" 221*/225* @ .50", 112* LSA) and using a performer intake I just picked up along with a 65 mm TB and 70mm MAF; still not sure if I'll have to jump up to 24 lb. injectors or not. Would these heads be a good fit for my combo in putting me around 300 rwhp while maintaing decent bottom end power (as much as the cam will allow)?
 

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#3
AFR's on a mildly cammed 306 will perform really, really well. AFR's are a great head. The average and higher hp-torque level's will be alot higher than E7's if that is the head you have. I don't think you will notice a difference in low end snap. Can't go wrong with AFR.
 
#4
I had them on my stock 80k bottom ended 302. I was very happy with them. With performer RPM, 30lb injectors, 218/222 @.05, 109ls, .528/.534 lift FTI cam, made 303rwhp. Only 6mph slower than Mike Keirsteads iron headed gt-40 combo :bang: , should ask him more about his setup :hail2:
Mike.
 
#6
Twisted Wedge vs. AFT 165

Hello all,

This is just my opinion, so please don't beat me up.

If you have ever looked at the flow charts of the AFR 165's you will see that YES, these are an excellent street head.

What you should consider if you are thinking about buying a pair.....

The AFR 165 heads come CNC machined. The Twisted Wedge heads do not, and they hold right next to the AFR's on the flow chart.

Just something you might want to consider, as a set of ported Twisted Wedge heads would be a better choice in my opinion.

Please let me know what you guys think. Thanks.

Bill
 
#8
I'm no expert, but what I have learned is that flow to port size is an important factor. AFR's do the best job of this, especailly with the 165's which flow about the same as TFS but with only a 165cc port, vs. the TFS 180cc port "or is it 170" so the AFR's keep the velosity, and do all this with smaller valves. Also, I have scene the best results with AFR's.

I can't say from expereince because I have Thumper ported E7's, now I think I may have outgrown them, and AFR 165's would be my choice but I am probally going to do a rebuild this comming winter and then I will get the new heads.
 
#9
Got'em. See sig.

A 65mm TB/EGR will be more than enough on a street/strip combo, 24# injectors, 70-73mm MAF, Performer intake, etc. would likely put out roughly 275-300 RWHP depending upon the tuning and other mods.
 
#10
all1knew said:
The AFR 165 heads come CNC machined. The Twisted Wedge heads do not, and they hold right next to the AFR's on the flow chart.
Click to expand...

I was looking pretty hard at the TFS twisted wedge's as a matter of fact, but as someone else mentioned, they have a larger port volume and valve size that would theoretically kill low end HP/TQ a bit more than something like the AFR 165's. Being that it's primarily a street car, I'm willing to give up top end power to maintain slightly better street manners. If I was doing a stroker build up, I'd probably be all over the TFS heads at that price.

Thanks for everyones opinions and advice.
 
#11
NKau said:
Being that it's primarily a street car, I'm willing to give up top end power to maintain slightly better street manners.
Click to expand...

Mine got 17-20mpg around town, 23-26mpg on the highway, and idled all day between 700-750rpms with no surging. Street manners will depend on camshaft selection more than cylinder head selection. I went with TFS "R" heads out of the box on my 418, #'s in sig. I've been happy with both heads, you will be too. EITHER head is a great choice.
mike.
 
#12
I just bought a set of afr 165. I have not put them on the car yet. I was looking at the twisted wedge heads, but a lot of people I have talked to said that the tw heads have problems with the valve guides and that they have to be replaced often. The other reason I got these heads is because the trickflow flow numbers are the same as afr 165 and the trickflow have a 2.02 valve compared to a 1.90. It is much easier for the air to flow by 1.90 valves than the 2.02 which in turn gives better low and mid performance. So personally I think afr makes a better street head than the trickflow.
 
#13
tistan2 said:
I just bought a set of afr 165. I have not put them on the car yet. I was looking at the twisted wedge heads, but a lot of people I have talked to said that the tw heads have problems with the valve guides and that they have to be replaced often. The other reason I got these heads is because the trickflow flow numbers are the same as afr 165 and the trickflow have a 2.02 valve compared to a 1.90. It is much easier for the air to flow by 1.90 valves than the 2.02 which in turn gives better low and mid performance. So personally I think afr makes a better street head than the trickflow.
Click to expand...

Trick flow fixed valve guide problem YEARS ago, it was an issue though. No longer an issue.
 
#17
i have 165s from fti on my motor...with my fti .547/.563, 224/228 at .050, 110 lsa. when the car is running, it is sweet. its untuned and went through the traps the first and only run i've had with it sideways shutting off in fourth after spinning every gear and blowing a freeze plug at 13.3 at 103...so untuned, fishtailing, and shutting off a good whole gear before the line, i'm impressed. just a 302 still, brand new though.
 
#18
the afr's seem to be a very nice head but don't down play TFS twisted wedge heads.. They are 61cc combustion chambers with I believe 170cc intake ports and with the Twisted Wedge design it rotates air over the center of the cylinder bores. And they don't loose low end torque. They don't require special pistons for the 2.02 valve as long as you stay within reason on your cam selection. they can hold .540 lift and I forget the duration but your cam shouldn't be an issue with stock pistons as long as your not using an 86 shortblock. My full weight 95 n/a 5spd with the box stock tfs heads, stock performer intake, 73mm maf, stock throttle body, crower 15510 cam 212 duration .531 lift, and the usuall exhaust, gears, and bolt ons went 13.1 at 109.5 mph with just regular 275/40/17 BFG street radial tires.. and it had ran a 109.7 mph and a 110.xx mph as well. I would have like to run it with slicks or DR's. and the computer was untouch with no tune. So TFS heads are pretty hard to beat for the price of them IMO And with the cam I used it pulled like a friking mule. No low end loss there. And later on if you were to stage III port the tfs heads.. well they are just awesome. And the valve train issues are a thing of the past as long as you use the crane gold, tfs, or FMS blue roller rockers.. others will ride the outside of the valve tip and bind them ruining the guides.. use the recommended rockers and your fine. the real issue use to be with the pedestal mount heads that are no longer made.

http://www.trickflow.com/product/prfeature_index.htm
 
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