Ported Chevy 083 heads, the tpi project
Moderator: Team
Ported Chevy 083 heads, the tpi project
Project for a friend, 87 tpi engine. 083 cylinder heads pictured washed with oil from honing the k line guides.
You do not have the required permissions to view the files attached to this post.
Servedio Cylinder Head Development
631-816-4911
9:00am - 9:00pm EST
631-816-4911
9:00am - 9:00pm EST
Re: Ported Chevy 083 heads, the tpi project
083 cut for 2.02" /1.6" valves. The stock seats and guides were hammered.
You do not have the required permissions to view the files attached to this post.
Servedio Cylinder Head Development
631-816-4911
9:00am - 9:00pm EST
631-816-4911
9:00am - 9:00pm EST
Re: Ported Chevy 083 heads, the tpi project
Rough out
You do not have the required permissions to view the files attached to this post.
Servedio Cylinder Head Development
631-816-4911
9:00am - 9:00pm EST
631-816-4911
9:00am - 9:00pm EST
Re: Ported Chevy 083 heads, the tpi project
1st design for flow tests.
You do not have the required permissions to view the files attached to this post.
Servedio Cylinder Head Development
631-816-4911
9:00am - 9:00pm EST
631-816-4911
9:00am - 9:00pm EST
Re: Ported Chevy 083 heads, the tpi project
1st flow test. These are very similar to what I did in the 90's for the old work truck's 355 that I still drive. Not spectacular but close to Vortec bowtie flows.
You do not have the required permissions to view the files attached to this post.
Servedio Cylinder Head Development
631-816-4911
9:00am - 9:00pm EST
631-816-4911
9:00am - 9:00pm EST
Re: Ported Chevy 083 heads, the tpi project
With 1st cut on head I started flowing parts of the tpi manifold to determine where the restrictions are. Stock tpi base knocked flow @.5" to 208 cfm, stock tpi tubes added 193 cfm, aftermarket siamese runners 183 cfm all with clay radius.
You do not have the required permissions to view the files attached to this post.
Servedio Cylinder Head Development
631-816-4911
9:00am - 9:00pm EST
631-816-4911
9:00am - 9:00pm EST
Re: Ported Chevy 083 heads, the tpi project
Ported base brought flow @.5" up to 223 cfm with clay radius.
You do not have the required permissions to view the files attached to this post.
Servedio Cylinder Head Development
631-816-4911
9:00am - 9:00pm EST
631-816-4911
9:00am - 9:00pm EST
Re: Ported Chevy 083 heads, the tpi project
Ported stock tpi runners bring flow @.5" to 200.5 cfm, ported aftermarket runners 190 cfm. The aftermarket runners are full of restrictive bulges. You will need a good sonic to get a decent shape. Stock tpi runners has very little metal to remove.
You do not have the required permissions to view the files attached to this post.
Last edited by Carnut1 on Sun Mar 03, 2019 2:37 pm, edited 1 time in total.
Servedio Cylinder Head Development
631-816-4911
9:00am - 9:00pm EST
631-816-4911
9:00am - 9:00pm EST
Re: Ported Chevy 083 heads, the tpi project
After and before tpi plenum. This needs lots of work for the aftermarket throttle body this project will have.
You do not have the required permissions to view the files attached to this post.
Servedio Cylinder Head Development
631-816-4911
9:00am - 9:00pm EST
631-816-4911
9:00am - 9:00pm EST
Re: Ported Chevy 083 heads, the tpi project
What did the stock head flow?
Stock head with stock base?
Stock head with stock base and stock tubes?
The work looks good.
Stock head with stock base?
Stock head with stock base and stock tubes?
The work looks good.
Somewhat handy with a die grinder.
Re: Ported Chevy 083 heads, the tpi project
After and before aftermarket throttle body.
You do not have the required permissions to view the files attached to this post.
Servedio Cylinder Head Development
631-816-4911
9:00am - 9:00pm EST
631-816-4911
9:00am - 9:00pm EST
Re: Ported Chevy 083 heads, the tpi project
I knew it would all get some work so I wasted no time flowing stock heads. I doubt they flow much above 200 cfm which seems a bit more than the stock system will flow. Thanks, Charlie
You do not have the required permissions to view the files attached to this post.
Servedio Cylinder Head Development
631-816-4911
9:00am - 9:00pm EST
631-816-4911
9:00am - 9:00pm EST
Re: Ported Chevy 083 heads, the tpi project
083 ported head 2nd port design, ported stock base, ported aftermarket siamese runners, ported stock plenum and ported aftermarket throttle body on bench. @ .5" lift 195.2 cfm. Pathetic.
Ported stock runners on same setup @ .5" lift 199.2 cfm
This was after quite a bit of work to aftermarket runners.Thanks, Charlie
Ported stock runners on same setup @ .5" lift 199.2 cfm
This was after quite a bit of work to aftermarket runners.Thanks, Charlie
You do not have the required permissions to view the files attached to this post.
Servedio Cylinder Head Development
631-816-4911
9:00am - 9:00pm EST
631-816-4911
9:00am - 9:00pm EST
Re: Ported Chevy 083 heads, the tpi project
Do you have a decent single plane and carb you could try on it?
Somewhat handy with a die grinder.