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Question about trickflow R heads on 302

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10K views 37 replies 14 participants last post by  1foxbody32  
#1 · (Edited)
Okay guys I have a question I have brand new trickflow twisted wedge R heads just sitting in there boxes,brand new crane gold race 1.6 rockers,brand new trickflow stage one cam heres the specs posted below.well what im wondering is will they fit on a stock 302 with stock rods,crank,and pistons without clearance the pistons for the large valve's 2.08 and 1.60,also will the piston to valve clearance be ok with my cam?? And let me tell you what I have planned for the setup im going to be putting a turbo kit on it I plan on running a 76-78mm range with maybe a .68 or .81 exhaust a/r not exactly sure yet,im going to run either 3.27 or 3.55 gears in the rear with a 28 inch tall tire and for the trans im going to run a tremec 3550 faceplated by liberty gears with 26 spline input shaft all done up,the car should weigh somewhere around 2500-2600 with me in it the car is very very light,so are these heads over kill??? if you need anymore info let me know.

Part Number: TFS-51402000
Cam Style: Hydraulic roller tappet
Basic Operating RPM Range: 2,000-5,500
Intake Duration at 050 inch Lift: 221
Exhaust Duration at 050 inch Lift: 225
Duration at 050 inch Lift: 221 int./225 exh.
Advertised Intake Duration: 275
Advertised Exhaust Duration: 279
Advertised Duration: 275 int./279 exh.
Intake Valve Lift with Factory Rocker Arm Ratio: 0.499 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio: 0.510 in.
Valve Lift with Factory Rocker Arm Ratio: 0.499 int./0.510 exh. lift
Lobe Separation (degrees): 112
Intake Valve Lash: 0.000 in.
Exhaust Valve Lash: 0.000 in.
Computer Controlled Compatible: No
Grind Number: HR-224/339-2S-12

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#2 ·
they r too big of a head for a NA 302/306 but r fine for a turbo. tiny cam for a turbo app. In addition, u will have to have ur pistons flycut to accept the larger valve.

a TW or track heat 185 or 205 head would work with ur stock pistons and a TFS stage 2 cam but u may have to degree the cam to get it to clear P/V.
 
#3 ·
Thats good im thinking about using the heads im sure its not muchto get them flycut and then balanced and as for the cam the reason why I chose that cam over the stage two is because the max rpm will be like 6000rpm tops.Thanks for the info
 
#4 ·
u can have the piston's flycut in the engine and there is no need to rebalance them.

a baby cam and big ass heads on a turbo is a waste of time. go TFS stage 2 to get more power faster and still only spin to 6000. duration and lift make power. an F-cam would be a better cam than the stage 1.
 
#7 ·
I just thought they had to be balanced after cutting them but I guess not more money in my pocket ha

now you have me thinking maybe I should get the tfs stage 2,I could easily sell mine and get the stage 2.
 
#5 ·
I want to see the vid with all that stuff on when you make ur first pass... that thing is gonna puke the guts out of the oil pan.... if ur lucky. you are adding some very nice parts,to a very weak engine. You really should coinsider tha fact that if it blows, you may f up those nice heads. they cost more than a good block on these forums in the classifieds....so I know you got the money, the heads are close to 2 grand alone, and you prolly spent anothe 3-5 on the turbo set up. do the right thing, put a dart block in it and let it rip!!!!
 
#6 ·
why would it puke its guts out? i don't see the thing making anykinda power na with those big heads on it... and 6000 rpm, i don't see it having a problem living at that rpm range... just my .02 but i've never messed with stock bottom end stuff....
 
#15 ·
Sure the stock block is good up to 500-600hp, if you are lucky, but the rods? Just be sure to send good videos and pics of the carnage. Everyone likes to see carnage! :rofl:
 
#17 ·
I just got off the phone with trickflow they said it can be done I just have to get the pistons flycut and I should sell my cam and go with there stage 2 so it looks like everything is going to work for me. I know a few people that made over 600 on race gas with stock crank,rods,and pistons go read on turbomustangs it has been done before its like a ticking time bomb haha
 
#24 ·
I know a few people that made over 600 on race gas with stock crank,rods,and pistons go read on turbomustangs it has been done before its like a ticking time bomb haha

Thats the key right there ticking time bomb. Yeah it might run 9's once or 50 times but I couldnt go to the track everytime thinking is this gonna be the run I split the block then the cars down again. If you dont got the money go for it you'll spend more on $200 blocks then you would on a good block and bottom end over the course of a season.
 
#18 ·
ya run the stock block and keep the rwhp at or below 450-500. turbo's r easier on stock blocks than s/c ers.

and yes, go tfs stage 2.
 
#23 ·
CNC ports or just the chamber? I paid 1400.for mine with upgrades like titanium retainers and good springs. I bought mine because I already had headers from a previous engine that fit r heads and at 1400. I couldn't get a better head. If you already have them use them you won't be disappointed. Check ptv and go for it. I didn't use the tw piston and don't have problems.
 
#26 ·
They are the cnc chamber,I would think they cost more than $1400 mine are assembled also.I would of thought somewhere in the range of $2000-$2200

Im so confused because if I do use them then the upper and lower intake I have already,the stage 1 cam is too small I have a ported gt-40 lower and cartech polished boxed upper,I would have to sell my cam to get the stage 2 and get the stock pistons flycut.But if I sell them I can get some used afr 185and use my cam,upper and lower intake and not risk the chance of messing up some very nice heads.Also I might get away without getting the pistons flycut.I need to make up my mind lol
 
#28 ·
Keep them and build another engine for them. Run the stuff you have until you save the $ to build the new one. I'd rather have bigger afr heads or the R for boost. The big head isn't a downfall with boost as it would with small cubes NA. The heads may be worth more I think I got a great deal(mine were assembled also,new in TFS plastic)
 
#29 ·
Iono yet because im going to have to buy a new or used intake if I use the r heads anyways and I really wasnt trying to spend that must on 302 because later on I do want to do my stroked out dart setup and maybe even better heads than the r's to use on the dart setup.Ill see tho I just need to make up my mind soon because im going to be making a huge parts for sale thread once I take pictures of everything and figure out what im not using for now.
 
#30 ·
Remember the heads flow better than what the tfs cams are intended for so the cam may be better then everyone thinks. People look at cam numbers with out seeing the whole package,the smaller cam big heads small cubes I think would work well. I could be way off but we all could be. I'd ask someone that builds engines and knows about air flow and everything else that goes along with racing engines. I feel most of us have lucked out with combo's that work but may not be an optimal combo.
 
#34 ·
what are your goals? i'm sure you could easily run 9's with a set of afr 185's, 302 and a 76mm turbo and 10-15 psi

my opinion, the heads are overkill and would be more ideal on a 408 turbo setup.
 
#36 ·
My goal is to run 9's on a stock shortblock,Im thinking about selling the heads and maybe run afr 185's like you said I also have someone that wants to trade ill see tho. I know it could be done my car is very light too so it should be easy to dip into the 9's
 
#37 ·
If I did that would stock 351w rods,pistons,and crank hold up like the ones in my 302?? Also would my intake manifold and all that stuff fit?? Because usually the block goes 1st with the 302 thats why in my eyes theres no sense building up a 302 with all that stuff since the block is the weak link and the internals can hold up just fine.