Anyone Extrude Hone or Flow Bench Speed Pro Heads?

[giddyup306v1.1]

Been a long time since I've posted on here. My account was hacked (Giddyup306). If a mod sees this, I'd like to know if I can get my Founding Member stats back.

Anyways, I have a set of these. I'm being a guinea pig for these. The machine shop that I go through said they have problems with the Pro Stock heads ripping out rocker studs. They are only rated at .500" lift. I have one of their cams, but no cam card!? You're kidding. I've bought a few SP products, and their customer support is non-existent.

I'd like to see what numbers or times you have for anyone that used them. I'm replacing the 2.02" valves with 2.08 or 2.05 intakes. The exhaust will be 1.65.

This is going on a 435 Windsor. With 210 CC runners it will run out of steam around 8K. This is a n2o engine. I learned long ago to make as much engine power as possible and go with a nitrous grind.

I've been out of the Mustang scene for a while. This is to replace my 9,500 RPM alcohol engine that was stolen.

So... am I the only one dumb enough to go with something crazy? After EXing them I'll do a 6 angle valve job and some hand porting/polishing/blending.

 

[giddyup306v1.1]

EDIT: I meant Speed Master. It's been along day...

 

[General karthief]

EDIT: I meant Speed Master. It's been along day...

Is that the company that has been cloning speed parts? I remember a video that discusses this. I'll look around.

 

[giddyup306v1.1]

Is that the company that has been cloning speed parts? I remember a video that discusses this. I'll look around.

Yes. I saw the link and it claimed that they only flowed slightly better than GT40 P's. But I had a set of Edelbrock 6025 heads. They had 1.9 intake and 1.6 exhaust. After putting in 2.02 valves, I did a baseline. They only flowed 215-220 on the intake with the bigger valves. I took it to a machine shop (I was yong and my first engine build). The machine shop said there was nothing they could do to improve flow. I started build engines for a living. One guy I worked with ported them, and he got them up to 320 CFM! But I had 2.08's and 1.65's at the time.

I went to take the valves out to send them in tomorrow. These cheap chinese heads won't work for the exhaust valves! Only head I couldn't get valves out of. Oh well, I wanted a pneumatic spring compressor anyways.

Eric Weingarner (sp) did a video on them. There is lots of room for improvement. And used Trick Flow heads I saw were $1800 each! I think I can make them work and come out ahead.

 

[2000xp8]

I used to have a set of extrude honed twisted wedges.
The flow was notably better than they were stock.
I lost the numbers though.
In theory (at least for the time) the extrude honing cleaned up and straightened out the ports without making them too big and killing velocity.

I'm not sure i would spend the money or time on substandard heads.
Given the choice, i think i would rather have a quality stock head than a modified crappy set.
Seems like gambling to me.

 

[Noobz347]

Been a long time since I've posted on here. My account was hacked (Giddyup306).

What account was hacked?

If a mod sees this, I'd like to know if I can get my Founding Member stats back.

This might be possible but it will cost you.

 

[AeroCoupe]

Just get some high port heads for that rpm and spend the money on a reputable porter.

 

[Bullitt347]

A 210 cc head on a 435 Windsor on NOS at 8K rpm is not going to work. (well)
Can it spin 8K with that head, sure, but it will be done at 7-7,200 if not sooner and dropping off fast.

 

[Noobz347]

Did anybody else notice how old this thread is before me?

 

[AeroCoupe]

Yeah missed that here. So is this @2000xp8's fault or are we just all morons...ha ha ha!!!

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[2000xp8]

It's only a year, lol, we've see and done worse.
Sometimes i read through the posts and the similar ones are underneath and i click on them for curiosity never really looking at the dates.