Best heads for stock bottom end?

[86droptopgt]

Hello curently running a 86 gt 5.0 5 speed Purchased car with long tubes, pullies, 3:73s, gt40 heads, mass air, cobra upper lower intake, CAI, and has a mild cam (unknown what kind). I believe the engine may be a newer block I have to run the casting numbers to be certain Looking for more power now, runs strong but always room for improvement. Just picked up edelbrock rpmintake and I am interested in getting a set of aluminum heads. Question is if I go with 185cc do I need to swap pistons? Whats the best bolt on set without getting too heavy in engine building? Looking more for a nice easy swap for more HP & TQ. Would like to be in the 300-350hp range at flywheel. If you know part numbers that would be awesome, thanks!

[LilRed86coupe]

I have put 4 sets of these Trick Flow 170 heads on different Mustangs with stock shortblocks and they all ran great afterward.

http://www.ebay.com/itm/2-Trick-Flow...c2d2cd&vxp=mtr

[horsepowerjunkie]

If you are talking AFR 185 then yes, you may have piston to valve clearance issues. The AFR 165 or Twisted Wedge 170 will easily meet your goals, & should both work on a newer short block with vavle releif pistons. IMO the Victor intake is overkill in your application.

[86droptopgt]

Thanks for reply. Yea I was lookimg at the trick flow street heats because they definitely have a nice price but the note says "Trick Flow twisted wedge pistons are required for use with these heads to allow for piston to valve clearance with camshafts over .550 in. lift. Heads are drilled to accept 1/2 in. head bolts. Valve cover rail is raised .350 in. over stock." Im just not what my cam is. Its not very choppy does anyone know what lift the mild cams are?

[86droptopgt]

Sorry horsepowerjunkie I meant edelbrock rpm intake.

[horsepowerjunkie]

The RPM intake should work great! As long as you are in there, why don't you just swap out the cam for a modern profile? The last stock short block I put togather, I used a Comp XE266HR cam, out of the box TW 170's, this combo ran outstanding, I would highly recommond it for a mild build.

[86foxvert]

I have the TFS 170cc heads with a weiand 174....... It's dangerous!! Good choice......

[Chris Wood]

Love my Trick Flows!

[PaceFever79]

Twisted Wedge 170s, especially for 86 flat top, bolt em on and go.

[PaceFever79]

Also I'd keep that mild cam.

Don't underestimate the importance of torque for a 302 street motor. Those TW 170 heads and RPM intake will flow plenty up top. Keep the cam mild and you have the best of both worlds. It will be a better all around street motor.

[86droptopgt]

Thanks for the advice guys. Seems like the trick flows arethe wayto go then. Does anyone have a good link for casting numbers for the block? Id like to see if I have a 86 flat top piston engine prior to actually rippng it apart.

[PaceFever79]

Thanks for the advice guys. Seems like the trick flows arethe wayto go then. Does anyone have a good link for casting numbers for the block? Id like to see if I have a 86 flat top piston engine prior to actually rippng it apart.

Here you go, all you need to know about SBF casting numbers.

http://sbftech.com/index.php?topic=175.0

[Mustang-junky]

An interesting read that may be useful to you;

400HP stock bottom end and cam.

http://www.carcraft.com/techarticles...ngine_buildup/

Jess

[srad2drag]

I would go with a xe270 cam or xe276 along with a systemax intake. It's a proven combo that works great on 302's

[86droptopgt]

Thanks for the info guys again. I tried looking up the casting numbers but all I saw was years of grease. Im going to keep doing some research and hopefuly pull the trigger soon.

[danco86]

An interesting read that may be useful to you;

400HP stock bottom end and cam.

http://www.carcraft.com/techarticles...ngine_buildup/

Jess

I have this setup on my 86. Had to fly cut the flat tops for ptv. AFR 165's, Comp cams roller rockers. Shorty headers. Cobra intake,stock injectors and MAF. I found this article a year after I built the engine and am now thoroughly looking forward to dyno testing it when I finally get it running in a couple months or so.

[80stang]

TFS 170 heads are the way to go. They are very good for your purpose, but also give room for future upgrades.

TFS170 with TFS Stage1 cam, around 9.5 static CR, Weiand Street Warrior intake = 377hp at the flywheel dynoed in a reliable engine dyno. Your RPM intake should do pretty much the same.

[86droptopgt]

As far with the trickflow 170 heads do I go with 58 or 61 combustion chamber volume?

[PaceFever79]

you want the 58cc for naturally aspirated 302/306,

61cc is for controlling compression ratio in stokers, 351s, and forced induction

[funnelcake]

You might do some addl. research on the intake. Depending on your heads/ cam combo the Edelbrock parts may not offer much over the Cobra parts.

Funnel

[86droptopgt]

So I sourced a set of heads locally. Not many miles on them. Trick flow 170s but with a 61CC. Can I use these?

[OldManRiver]

I was under the understanding that with the 58cc heads Trick Flow recommends their pistons because the valve reliefs are cut in the proper orientation for their canted valve design,but this may not be the case(?).You may run into trouble with the 58s,I think the 61cc head is what most run but.....
I will be making the purchase soon myself and am going with the 61cc version for my '86(stock flat tops).

I say pull the trigger.
OMR

[86droptopgt]

Well I bought a set of used trick flow 170s. Guess I will be looking for rocker arms, a stud kit and maybe 24lb injectors soon. I will also try to see if my cam is going work. Thanks again everyone il let you know the results.

[horsepowerjunkie]

You made a good choice. You won't be disappointed!

[Handlebar Moustache]

I went with 61cc TW 170s for that reason. The small increase in power that was going to come with the compression ratio bump wasn't worth the worry. Also you know that you can run 87 octane on a hot day without a problem with the 61cc heads.