I have recently acquired all the pieces for my vortec tpi conversion.


The cylinder heads are reman wheeler with a larger 1.6 exhuast valve and their own 3 angle vavle job on intake and exhuast....since im not real crazy about blowing the money on getting them ported. im just going to clean them up.

#1
on the intake side their is a small step al the way around the port that then angles into the runner, looking directly into the port, should i go do far as to clean it up and make it a nice smoth transition folowed by cleaning up the flash in the runners?

#2
since they did their own 3 angle valve job is it worth disassembling the heads and blending from where the machine work ends into the bowl(intake and/or exhuast), again for a nice transition

#3
the exhuast port itself, i see some room to slightly enlarge it and again smooth everything over and to make them all as uniform as possible

#4
just me or does everyone else with the sdpc vortec tpi intake think it looks like sh%&%&?
Anyhow :-) looking at the inj bosses like previoulsy mentioned yeah they intrude a little too far for my tastes im putting old injectors in and going to town there ;-) (only reason i can think of is the fact that vortec heads have raised intake ports which would basically intrude upon the boss when using tpi: vs reg heads where u dont notice the boss due to the fact the intake ports are shorter)

How much room do we really have to go to keep porting these runners out? Doesnt look to great for serioulsy increasing runner volume to me...think sdpc would shed light on this for us? Im going to enlarge and smooth the runner end of the ports as much as possible and then work on making the head side of the ports more rectangle like than they are and attempting to blend the bosses into the roof as much as humanly possible(hence old injectors to fill the holes so i know when to stop)

PS Jason Snyder at PACE PErformance was awesome about the GP that i set up and definitely spent some time on it with me looking for stuff might pay to dial him up :-)
later
3.8TransAM/TTA/Jeremy

 

TTT
please any experienced head porters, please respond

vader u out there? post up your two cents worth, i knw we've talked about some of this before :-)

 

Yes its worth doing

 

Found someone reputable to shoot the sh#$% on vortec head porting :-) Mike from AMP in Kentucky was the guest speaker at the Chicago GSCA meeting and was quite an informative conversation.

On the topside of the intake runner , leave it alone ...they have found no flow gain on the roof itself :-)
Most important area for increased flow has been found on the shortside radius , so clean it up and make it flow: just be careful the casting is not the thickest....

second on his list was to clean up the bowl while not going crazy, use your judgement and keeping the factory shape(duh) clean it out and open it up slightly where possible

third: from the three angle valve job performed, it is beneficial to clean up and blend in the machine work , no serious benefits but it will pay off in slightly better flow...

fourth: directly looking at the intake face of the head u will notice the angular transition of the head face into the runner itself: again no major gains but will show a light improv if cleaned up and smoothed to a lite roll into the runner..........

exhaust side can be opened up, again on the short turn radius, and i will remind u again that these heads are not the thickest :-)
u can also open the exhuast port in a similiar fashion to the intake port.......

The most important point of our conversation is that these heads are outstanding for a factory head :-) So dont be stupid and get sloppy......if u clean up whats there and using some common sense, u can have a very cheap head that will flow more than most aftermarket heads out of the box :-)

easiest way to say it is that they are getting 270cfm on the intake side only enlarging the runner cc to 175ish amazing flow numbers considering the stoak runner cc comes out to 169-170 cc out of the box..... So u have no reason to go crazy :-)

Vortec TPI intake :-)
I have several calls out to associates who should be able to give us the inside track as far as flow in cfm of course :-) and hopefully where and how much material can be removed safely
should have some info on the intake t'row (fingers crossed)

will post again asap

 

Does any one have the Pace parts TPI Vortec intake base? I'm trying to decide which I want to go with the Pace or the SDPC. I would like to see some flow numbers on the bases. How much does the stock flow, then how much does the Pace and SDPC flow? I think a lot of people want to know these numbers. Also I'm wondering about the injector mounting boss. How much does this hang down in to the port? Also if how much can you work on this area on the injector boss? Also do the people that you talked to say how much could be picked up by cleaning the short turn radius on the intake and exuahst ports on the heads? Any of this info would be great. TIA.

 

Cant believe no one is adding anythign to this post :-( doh

still waiting on flow numbers for the tpi base and if sdpc will enlighten us on any beneficial porting and where we need to watch and where we can cut away

hopefully t'row i will know more

 

Yes flow numbers good. As well as some ideas about where we can port on these intakes.

 

doesn't pace buy/get the base from SDPC?? I went to order my "kit" this morning and found out they are backordered. Now i have to wait for next week or go i another direction ie: heads and cam.

And on another note, "pace" says the bases are not made by Mr. ED.....

 

Pace is full of it. SDPC had their bases made by edelbrock and Pace gets the base from scoggin. If the base is back ordered guys that means they sold all 1000 of the inital run and it is going to be a long wait till you get any more bases. You might want to contact howell and street and performance. Thye may still have the bases. That is if they took delivery of the base. I know they were going to but who knows.

 

I wouldnt exactly say PACE is full of it :-) After all i did set up the vortec conversion group purchase thru them and JAson Snyder (ext 173) was more than helpful during the entire time and has even answered more questions for me after the fact as well...Im calling him back t'row on a few things

They were the only ones who would cut us any slack on anything at the time :-) So thats where my money went ...

As far as the SDPC base goes it is made by EDELBROCK for SDPC and they basically choose who can or cannot carry the base, unfortunetly that also sticks us for 400 a pop! ouch :-)
later
vortec tpi conversion date : second weekend of april
with ported vortecs good thru 550 lift by moi and ported sdpc tpi base ported by moi :-)

 

TTT

figured this one would ake people jump with all the interest in vortec heads and the new base for tpi :-)