porting injector housings to 36MM

[tpepmeie]

Who?s doing the heads and what size valves?

What rpm do you expect peak power?

Last time I measured the injector housings, they were about 4" long centerline (101.6mm). From that you can work out either diameter or volume, if the other is known.

[wfot]

I got the heads already ported, I believe they were actually done by bill krichoffner for kurt white's old 415 from way back, the valves are 41.5mm and 35.5mm stainless. the chambers have had some smoothing/unshrouding done, but I think they could use a little more. Ti retainers/secondaries removed.

I understand that the stage III's have a pretty high peak RPM, so I am expecting peak between 6900 and 7350 or so..

[tpepmeie]

Originally Posted by wfot

I got the heads already ported, I believe they were actually done by bill krichoffner for kurt white's old 415 from way back, the valves are 41.5mm and 35.5mm stainless. the chambers have had some smoothing/unshrouding done, but I think they could use a little more. Ti retainers/secondaries removed.

I understand that the stage III's have a pretty high peak RPM, so I am expecting peak between 6900 and 7350 or so..

The oversize inlet valves back then were typically 1.600" inches / 40.6mm.
Bill is a great guy, I just talked to him a few weeks ago.

This is a 402" engine? 4.00" stroke?

compression? << nevermind, I see 12:1>>>

[tpepmeie]

Originally Posted by tpepmeie

The oversize inlet valves back then were typically 1.600" inches / 40.6mm.

I have to correct my post above after talking to Bill. The correct measurements for the valves he installed are: intake 1.580" or 40.132mm and exhaust are 1.445" or 36.703mm.

Perhaps Kurt had additional machining done and new valves after Bill did the initial work?

[wfot]

caliper says 41.5mm across the thickest part of the head

I also have one of bill's 12mm studded blocks, 12mm studs on all mains very nice work indeed. The thing is a tank. I hear good things about him as well. I think that was kurt's actual 415 block as well. From what I read, Kurt was going all out with that build and Bill did the work. It does look good. the heads are very nicely done. But I do not have any other LT5 heads to compare them to. Might do some bowl work and match the ports a little, but they are pretty much ready to go

and yes 4.00 x 4.00 motor, bryant crank.. work of art

I am planning on 12 to 1, but if head gasket selection can get me to 12.25:1 or 12.5:1 I would do that a well

[wfot]

I bought a 402 "Project" package a few years back. I am almost positive the block is kurt's and was done by bills. the heads I cannot be so sure of. so anything is possible, especially given the many years that have pasted.

for instance;The manifold is a true siamised manifold, the outside it beautiful but the inside is a mess. have no idea who did those but they were done for ecstatic purposes I am sure. The housings are a mess and have various port sizes and there is some serious weld overlap on the plenum. it is taking a long time to figure all of this out and actually get things into shape but it is coming along well.

If this was a typical small block build in the end, no way I would put this much time into it... lol

[Polo-1]

Originally Posted by wfot

I bought a 402 "Project" package a few years back.l

Hello
I tried to send you a pm on this 402. It might be my old 402. I have lost track of who owns it now. It went through a few hands.

Kevin

[HAWAIIZR-1]

Originally Posted by Polo-1

Hello

I tried to send you a pm on this 402. It might be my old 402. I have lost track of who owns it now. It went through a few hands.



Kevin

Wow! Talk about a blast from the past. It?s good to see you are still around Kevin!! [emoji1303]🤙🏼


Sent from my iPhone using ZR-1 Net Registry

[Polo-1]

Originally Posted by HAWAIIZR-1

Wow! Talk about a blast from the past. It?s good to see you are still around Kevin!! [emoji1303]🤙🏼


Sent from my iPhone using ZR-1 Net Registry

Yeah still peek in once in a while. Can't get the old LT5 out of my blood. It's a bad boy for sure.

[tpepmeie]

Hmmmm. I think I recognize that description. Many years back there was a gentleman on this forum (Kevin P.) who spent a ton of money building a 402 using parts sourced from Bill. This would have been 2009-10 time frame. I forgot his screen name, but he and I chatted several times about that build. At the time I was building my first 427 and we would friendly jab each other about which had the nicer parts!

PM me if you want to discuss.