TXGS507

You go girl...

Josh B.

MTPZ06

What the heck were we talking about?



Just hopefully its not the sh*tty N'awlins version...

CammedC6520

If I can't pawn my heads off I'm gonna have to go with AHP port, but I just can't believe I can get a 30rwhp gain with ported heads I do have the btr4 cam to help suck in more air. What do you guys think 800$ worth it for the gains of AHP port or should I save my dough.

MTPZ06

My opinion...keep your BTR4, stick with Kohle porting the heads, add a ported MSD and NW TB, retune and enjoy the car.

CammedC6520

I have all that just need to send the heads to get ported now

Turbo2L

Are your current heads ported? If so, by who?

CammedC6520

They're done by AHP but not ported yet, I might have found a buyer. I got a few new mods. Was gonna do a new build thread but I don't want the drama

REDZED2

Fully re CNC'd or hand ported LS7 heads by hand don't do much without a cam. I know this as fact. For anyone out there who is not camming but needs their heads rebuilt, just mill as much as you can. Your octane will thank you for it.

cv67

8 bills aint much for a good port job get it done it really makes a differnece. If i had a choice Id port over mill and day of the week.

REDZED2

Been dyno proven over and over. Dozens of threads on this. Milling is where the power is compared to porting. Especially on near stock motors. Waste of $$$. Mill .030, rebuild heads. 30 hp. Well depends on your gas obviously. Fair sized cam, ported intake of your choice, full exhaust, then full port and mill accordingly to what the cam allows.

CammedC6520

I do have a BTR4 cam
This is not done by GP Tuning only his up coming tune, parts are supplied by AHP and put together by me..... what ever outcome is because of me not them.



Ok guys this is going to be my second build on this engine. I screwed up not getting my heads ported in the beginning so here goes round two.

Currently have

BTR4 cam
Kooks 1-7/8
Catless X pipe
Modified z06 exhaust
Halltech intake 103
AHP hardened pm guides with .020 milling
Dyno numbers:
WHP:511
TRQ:465
New set up

BTR 4 cam
AHP moldstar90 Guides milled .020 and ported
Stainless works 2 inch headers
Non cat x pipe
Modified z06 exhaust
Ported MSD intake
NW102 TB
Halltech 108mfr
GPtuning custom injectors

Dyno numbers:
WHP:coming soon
TRQ:coming soon

Keep in mind this was on a old old old old mustang dyno on a hot day

Gonna follow up and post pics and keep you guys informed

Michael_D

These heads already flow like crazy. They do not “need” much, if any, improvement at all on the intake side. They do not stall until around .625” lift, and that stall point will still accommodate .650” lift. Only very mild work is warranted to the intake port to raise that stall point to .675".

The reason why these heads can be helped with porting (by someone who knows what the hell he’s doing), is mostly on the exhaust side. If done correctly, you can reduce exhaust duration without adversely affecting the overall power curve. Without any port work at all, this engine needs at least 20 degree more exh duration than intake. With proper porting, you can reduce this split by almost 50%. Sooooo……what that does, is it allows you to run more INTAKE duration – which is ultimately allow the engine to make more power. Many of these so called LS7 camshafts do not have enough exh duration for the lift, and when used with OEM castings, power levels end up being lower than expected. The BTR4 camshaft is a perfect example. It will not perform at its peak potential with OEM castings.

Milling has the obvious benefit of raising cylinder pressure without any change in VE. Bonus.

Josh B.

Milling is where it's at. Some people prefer not to mill with 91 octane. Some people mill with 91 and adjust spark. I would always mill, cheapest hp there is for an LS7. You can also go to a thinner 0.40" for a tighter quench which has benefits. But you have to measure PTD clearance, but most SBE LS7s come out at +.005".

I hope you tagged and bagged your small parts. Looks like parts are spread out.

CammedC6520

This is my 4th round I can remember every nut and bolt lol.