OK it's time to start building!

Build Cost:
So far:
l98 iron heads: $100 shipped
intake/tbi adapter: $175 shipped
BB TBI: $170 shipped
SA Porting kit $60

Future buys:
Egr valve: $50
TBI rebuild kit: $40
bolts: $20
plumbing/gaskets: $100 (guess)
Machining:$300 (over-budgeted) (performance valve job +cleaning +recon)
LT1 springs, locks retainers: $50

Freebies: zero! zilch! nada!
Total so far: $505
Freebie value: $0
Total+Future Buys: $1065

I don't think that's too bad for an entirely (as) new top end.
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I just wanted to get your guy's opinion on this stuff. It seems a shame to go ahead and put all this stuff on my 113K shortblock. Should I invest in a new shortblock?

I can't wait to start porting away!
If anyone knows how to save money on a valve job let me know!

 

Not bad but I would get a different adapter plate. I doubt that will clear the hood.

You just need some machine work on the heads, a big cam, and lots of chip work.

 

I hope it does clear. I didn't measure it exactly. I'm running a supercharger so I don't want to go much bigger than the LT1 cam with 1.6 Roller rockers. I bought the SA porting kit and there's a bunch of great articles here on porting these heads. Then I'll have a 3-angle valve job/recon done to them. Should flow as well as vortecs after that.

As for the tuning, I'll be buying an autoprom from craig (Maybe santa will bring me one!!!) I think my ecm is up for the task.

What do you think about waiting for a new short block? Should I do it, and just do a whole engine swap? Or should I slap these puppies on my 113K mile L05 short block? I've seen some L05s go for 265,000 miles.

 

It will fit just right, with a 14x3 drop base.

Actualy I fit a 1/2" nitrous plate under my holley adaptro also, but had to cut down the AC stud, and remove the AC spacer. I highly doubt that is thicker than the holley adaptor, and a nitrous plate.

 

its on a tahoe! plenty of room

stuckatcuse: i see you play on full size too

 

Shhhhhh! I'm temporarily masquerading as a thirdgen.....

I think it will fit. I have several inches of clearance above the TBI, even with the procharger bonnet!

 

Don't use the adapter you have pictured!

It was designed to mount the TB to a Quadrajet dual plane intake.

Flip it over and look at the bottom. It directs most of the fuel mixture toward the rear of the intake.

This will cause your rear cylinders to run rich, fronts lean.

Ask me how I know

BTW, you'll be glad you chose the single plane for TBI

 

Yeah I noticed the grooves in the adapter designed to direct flow to the rear of the manifold. Do you have any suggestions as to which adapter to use? I don't have any clearance issues... but I like the idea of coolant flowing thru the unit. You think I could just grind out the grooves?

 

Holley and Turbo city both make nice adapter plates. A few searches should yeild you some part numbers.

 

What about just grinding out the grooves? I like the height of that adapter because it will allow the IAC to clear the EGR valve.

 

Nope. Been there, done that. I use the Holley adapter. Others have used ones that center the TB over the manifold opening. The Holley places the TB forward about 3/4".

Do a search

The purpose of the plate is to heat the TB, not cool it.

Get as far away from that water donut as fast as you can.

 

I know the purpose of the plate is to heat the TB. I'd imagine this would help with both cold-weather operation and emissions. Since it can be about -20deg F here in the winter, I'm asuming it would help me out overall. Bummer about the rear-cylinder lean condition. I guess I'll just have to e-bay the adapter. You don't happen to have the part number for that holley adapter plate, do you?
If anyone has a cheap one lying around I'll take it!

 

 

I came up with this: https://www.thirdgen.org/techbb2/sho...apter+plate%2A

What do you guys recommend? Should I get a front-mount or center-mount spacer???

 

I have a Holley adapter that i never used.
Shoot me a PM if you think you might want it.

 

Can't say for sure. BBC's are known to run rich on the rear cyls.

Especially since your blown, I'd go with the centered. Probably make it easier with linkage, etc anyway.

 

How many miles do those heads have on them? I'd like to see em' after you finish em...

 

No clue how many miles. Sure thing, I'll post some pics.

 

Your PM box is full. I am interested, depending on what adapter it actually is...

 

Just out of curiosity, is there any reason it WAS designed this way? I'm unable to think of when that design would be a good thing...

 

Maybe its to replicate how the fuel distribution is with an actual quadrajet as they have 2.25" secondaries so it works properly with teh intake. Thats teh only reason I can see for it.

 

Gotcha... I took care of that and PM'd you a message

 

It's still full.

 

That's wierd, cause I emptied it before i posted the last message on this thread.
Checked and it's still empty.
Anyhow... Did you get my PM?
I located the part. It's Holley #17-41. I can e-mail you a pic, is your e-mail the same as the one on your profile?

 

Yup it's the one in my profile.
I'm still getting the message that you're full. Does this unit mount it towards the front or the back?

 

Dont forget to also delete your autosaved pm's that youve sent.

 

I'm working on that PM box problem right now.

The Holley adapter has 2 possible mounting locations. You can flip it upside down to move the holes forward or back.
For Qjet intakes I think it's supposed to be further back. But with a performer intake I think you might be able to use either location.

Let me plug in my camera and if it's working, I'll e-mail some pics.

 

In your profile, your email isn't shown.
Post it and I'll send pics.
Or you can email me at the address on my profile.

 

I get this:
Sorry! That user has specified that they do not wish to receive emails through this board. If you still wish to send an email to this user, please contact the administrator and they may be able to help.

my email is: stuckatcuse AT yahoo DOT com ... get it??

Sorry to bore everyone else with our communication problems...but if anyone is a zen TBI adapter-plate guru, then by all means, jump right in! (hint: va454ss)

 

If you must have heat:

http://www.holley.com/HiOctn/ProdLin...IA/f517-1.html

Same as above, just not heated:

http://www.holley.com/HiOctn/ProdLin...IA/f17-41.html

The one I use:

http://www.holley.com/HiOctn/ProdLin...IA/f17-45.html

 

Yep, I would agree. Plus, its just a dump truck engine stuck in a 1/2 ton pickup.

Was during the transition period from carbs to high tech tbi

 

You would suggest mounting any of these with the bores forward, even though the larger openings are at the rear... correct?

 

Huh?

 

The manifold opening is larger at the rear. Would you recommend mounting the adapter so the TBI bores are in the forward position? (I guess you could mount them either in the forward or backward location.)

 

Sorry

Yes.

 

When I bought that adapter, it was for a Silverado, with a performer intake.
I had a chance to line everything up and I can't remember which way it went but there was one position where the cables were all the right length. I think that's one of the reasons it's reversible the way it is, so you can use your original cable bracket.

Edit:

I just went and looked at it to see how it lines up on my intake and it looks like with a spreadbore intake like yours, it should mount with the bores slightly behind center.
The spacing between the outer edges of the holes is 4 3/8"