Inliners International Forums General Discussion Blown and Injected Lets Turbo my inline 250

long story short version.
i have a 1968 Chevelle with a Turbo V6, I ran a best of 12.10 on 10-26-2010.
I just blew up my engine, now i have to make a choice between rebuilding the V6 or dropping in the OE 250 with a turbo.
id like to build it on paper first to see how much $$$ the Turbo 250 compares to a high performance rebuild of my current T-V6.

I was/am thinking of starting of by just dropping in the 250 as is and strapping in a turbo with a Fuel injection set up and running it on very low boost just to see if id like the way it works and to keep costs down as much as possible in case i don't like it. If i like the way it works i'll pull the motor back out and do the necessary mods to the engine to reach my goal of 11.50s reliably.

What are the ballpark prices for these items and where can i find them?
1-Exhaust header?
2-Intake manifold
3-I have a very good TE-6031 that i can get a 3-TO-4 Bolt adopter flange. Would this turbo work on this engine?
4-Fuel injection management?
thanks for your help guys.
David

1) Clifford Racing and Langdon's Stovebolt make exhaust headers but those aren't turbo ready. SPA makes a t3 and t4 turbo manifolds that bolt right on.
2) Clifford Racing again makes a 4 barrel and I think they also have some multi-1bbl setups too. Offenhauser makes a four barrel as well and multi-1bbl setups also. I've heard that Clifford Racing manifolds are better for high-performance applications
3) If you custom fab it then I don't see why not but don't go with my word.
4) Not sure. I'm also planning a turbo 250 but I'm going to keep it carb'd.

Just for what your looking for, the clifford intake new is $300 and the turbo manifold new from SPA is like $600 but I'm pretty sure you can get the SPA manifold cheaper through some of the guys on the board. Other normal (non-turbo) headers from Langdon's stovebolt are in the low $200s IIRC.

Were you running a GN engine?

EDIT: You said you ran that on the 26th. Was that at the GS Nationals in Bowling Green, KY?

Just to show what the manifolds looks like. http://cgi.ebay.com/ebaymotors/SPA-Turbo...sQ5fAccessories

http://stoveboltengineco.com/index.php/c...product=1395980

The TR ,3 bolt turbine housings are a bit restrictive,maybe swap the turbine housing for a T3 or T4 housing?
That way,no adaptor needed & better flow.

What exactly are the turbos specs?

MBHD

thanks for the replies guys
yes it was with the GN engine it was at ATCO on a track rental.
this is it http://www.youtube.com/watch?v=DlDrVp7x1m0

The intake looks real intersting with the indiviual port injection bosses. Another Brazil item?

Intake is a Clifford.

I saw the fin design but the injection threw me off.So those injector bungs are cast in the newer Clifford intakes or are they a retrofit?? Hey I recognized the Mercruiser valve cover.

That's Tlowes intake & engine. Injector bosses were epoxied in.


MBHD

It's nice to have bosses cast in place, but if the surface area is large enough and well prepared, epoxy is fine. It's only got to hold 45 psi of fuel pressure (+ some safety margin). There's good DIY on line on how to clamp the injectors in place.

The epoxy has to hold the boost pressure & or vacuum.
Plus gas,cleaners,steam cleaners etc.

Just get them welded.

MBHD

More than 45 psi of boost...?

The injector bosses/epoxy holding in the bosses, does not see 45 psi of fuel pressure,the injectors & fuel rail will.

It will be haveing to contend with boost pressure or vacuum.

That's all.

MBHD

Now for the injectors to funtion a bit better are there divider plates installed in the intake and head?

i was going to ask the same question.

I would say it would be better to do both.
But if only one choice,then do just the head,,,, but need to open up the intake port window quite a bit for the head to flow OK.
I personally have just devided an intake manifold,it helps also.
http://i87.photobucket.com/albums/k148/itsjustasix/Img_1002.jpg


Intake gasket mating surface gets thin.Be carefull!
Look @ this thread: https://www.inliners.org/ubbthreads/ubbthreads.php?ubb=showflat&Number=43253&fpart=16
,5th post down for pics.

I would be hesitant to devide both for all out HP, but for a driver ,more even A/F mixtures to each cyl & not too worried about making the most HP it would be OK.


MBHD