335 HP 396 290 Head Casting Build & Dyno Test

Glenn Briglio · 05-19-2024, 10:52 PM

Flow test should be done with correct bore size or you could be getting incorrect data.

HP HUNTER · 05-19-2024, 11:33 PM

Quote:

Originally Posted by Glenn Briglio

Flow test should be done with correct bore size or you could be getting incorrect data.

I will agree, but I'm just looking to see the gain, I will not buy a bore sleeve and top plate for this small bore project. I've been very impressed with your qualifying, great work!

Dwight Southerland · 05-20-2024, 08:06 AM

Did you pour the intake and exhaust ports for volume?

HP HUNTER · 05-20-2024, 09:35 AM

Quote:

Originally Posted by Dwight Southerland

Did you pour the intake and exhaust ports for volume?

Not yet, but I certainly will pour them, when I'am done the intakes will pour less than they do now. I will not be doing any porting, and they were not ported previously.

Adger Smith · 05-20-2024, 12:32 PM

Mark,
since I'm not well informed about the stocker combinatons...
What year and body does the 335 HP 396 fit?
I found the small cam 1969 335 HP 427 in Dwights class tool section

HP HUNTER · 05-20-2024, 01:49 PM

Quote:

Originally Posted by Adger Smith

Mark,
since I'm not well informed about the stocker combinatons...
What year and body does the 335 HP 396 fit?
I found the small cam 1969 335 HP 427 in Dwights class tool section

I believe its been factored down to 330 HP with an automatic, 1968 Nova, Camaro, Chevelle SS From GM 350 HP 396 .460/.480 lift. 335 HP 427 is .398 lift I believe.

Adger Smith · 05-20-2024, 02:10 PM

OK, Mark...that works.
I was looking for a GM rating of 335..& should have looked at 350 HP specs.
Yes, 335 is the rating for the 1968 350 HP 396 with stick shift.
What I think I saw is all bodies with stick in 1968 for stock are 335. (Base)
I see it has the bigger cam, too.
That Dog might hunt with a stick.
Thanks for the info...
Adger

Paul Precht · 05-20-2024, 10:39 PM

I'm guessing you didn't flow with the manifold on.

HP HUNTER · 09-13-2024, 04:31 PM

Done and ready to dyno.

05-19-2024, 10:52 PM	#1
Glenn Briglio VIP Member Join Date: Nov 2002 Location: Massapequa Park,NY Posts: 1,281 Likes: 1,892 Liked 969 Times in 307 Posts	Re: 335 HP 396 290 Head Casting Build & Dyno Test Flow test should be done with correct bore size or you could be getting incorrect data. __________________ 1989 Camaro Iroc-Z I/SA B&B Auto Machine Shop.

05-20-2024, 08:06 AM	#3
Dwight Southerland VIP Member Join Date: Dec 2001 Location: Arkansas - In the middle of everything. Posts: 2,000 Likes: 64 Liked 777 Times in 193 Posts	Re: 335 HP 396 290 Head Casting Build & Dyno Test Did you pour the intake and exhaust ports for volume? __________________

05-20-2024, 12:32 PM	#5
Adger Smith VIP Member Join Date: Dec 2001 Location: Texarkana Ark/TX Posts: 2,446 Likes: 575 Liked 880 Times in 311 Posts	Re: 335 HP 396 290 Head Casting Build & Dyno Test Mark, since I'm not well informed about the stocker combinatons... What year and body does the 335 HP 396 fit? I found the small cam 1969 335 HP 427 in Dwights class tool section __________________ Adger Smith (Former SS) Last edited by Adger Smith; 05-20-2024 at 12:35 PM. Reason: add

05-20-2024, 02:10 PM	#7
Adger Smith VIP Member Join Date: Dec 2001 Location: Texarkana Ark/TX Posts: 2,446 Likes: 575 Liked 880 Times in 311 Posts	Re: 335 HP 396 290 Head Casting Build & Dyno Test OK, Mark...that works. I was looking for a GM rating of 335..& should have looked at 350 HP specs. Yes, 335 is the rating for the 1968 350 HP 396 with stick shift. What I think I saw is all bodies with stick in 1968 for stock are 335. (Base) I see it has the bigger cam, too. That Dog might hunt with a stick. Thanks for the info... Adger __________________ Adger Smith (Former SS)

05-20-2024, 10:39 PM	#8
Paul Precht Senior Member Join Date: Dec 2001 Location: Elysburg, Pa Posts: 731 Likes: 353 Liked 314 Times in 119 Posts	Re: 335 HP 396 290 Head Casting Build & Dyno Test I'm guessing you didn't flow with the manifold on.

09-13-2024, 04:31 PM	#9
HP HUNTER Senior Member Join Date: Feb 2012 Location: Colorado Springs Colorado/Thousand Oaks Ca Posts: 656 Likes: 82 Liked 372 Times in 129 Posts	Re: 335 HP 396 290 Head Casting Build & Dyno Test Done and ready to dyno. Attached Thumbnails Last edited by HP HUNTER; 09-13-2024 at 05:47 PM.