BBC Help...

[88_50]

Motion427, I think Edelbrock makes a cam. Not sure about TBI heads. I installed the intake. Its a direct bolt on minus the throtle bracket.

Vile, thanks for the link. Thats a good read. Every site I read says go with the 049 or 781 heads. Guess from what I understand, the 781 and 049 are about the same, but the 781 has a smaller intake runner. I can get a fresh set of 049 118cc heads with 2.19 intake 1.88 valves, Manely 3/8 guides, Ported by NVR Racing, Fresh 3 angle valve job, Bronze guides and new seals, and Comp roller springs 943-16 240 @1.9 and 598 @ 1.250 for $500. Obviously I would change the springs if I buy them, cause Im not spending $600 for a roller setup for my 16 yo son. What do you think Vile? Is this a good deal? Do you think this is too much head, and should get the smaller 781's?

I'm still considering ditching the computer stuff. The wires are looking pretty ratty. Think the only thing I could do if I stay TBI, is find another engine harness to get rid of any gremlins it maybe giving me. I've just never been a fan of TBI...no offense to anyone. With the poor gas mileage and lack of performance, I think I could improve it across the board with the correct combo of carb/cam/intake/heads versus chasing down TBI gremlins/bigger injectors/fuel pump/cam/heads/and whatever else unknown to me with TBI.


Royo, how much timing are you running now? I will keep that in mind when we get it back together.

[motion427]

781 and the 049 pretty much the same,either one will do just fine.

If I remember correctly,they use the Edelbrock #60449 for the TBI setup.It also raise the compression.

Their was a sweet cam that we used on those TBI setup's.
Trying to find it right now......

[motion427]

This was an old grind that we used on a few of those TBI 454's.It was an old TRW/sealed power number.
But I think,now you can get it by Howard cams #120021-12.
It's small in numbers,but it worked very well.

But now,with new cam technology,Comp Cams has a couple of nice ones.
The bigger one #11-304-4 has pretty nice numbers........Haven't used it yet though.......

[VileZambonie]

In 1987 The C/K series was done in the old body style and became R/V. In 1988 The C/K's were that body style.

Only the 1500 series.  HD changed over in 92 to the new body style:
Here is a 1991 3500: http://rides.sporttruck.com/ride/1015433/chevyboy4/1991/chevrolet/k3500/index.html

Where did you get that information from? That is a V3500 not a K3500

[VileZambonie]

Do you have a 4L80E?

Either castings will work good and if those heads are all set ready to roll that's a decent price.

[topp]

Where did you get that information from? That is a V3500 not a K3500

The owners of the Old body style tend to call them "K"'s even though they are "V"'s
Many other forums dedicated to Blazers and Burb's...
When part hunting for 89 -91 Blazers and Burbs, we need to know what we can use. \

Here is another 91 V3500: http://coloradok5.com/forums/showthread.php?t=198335&page=64
And here: http://67-72chevytrucks.com/vboard/showthread.php?t=345243
The 2nd link will show you that any 2500 and 3500 for 88-91 will have the old style nose.

[VileZambonie]

Topp, what are you trying to say? 

[topp]

Topp, what are you trying to say? 

That in 1988, the Newbody style was introduced ONLY on the 1500 series Pickup...  The 2500/3500 kept the old nose found on the suburban for 89-91, hence the OP does not have a 1990 truck (at least the pic he posted) as that front end was ONLY on the 1500 series truck for 1990, and not the 3500 series for 1990.

"After 1987, R/V remained in use for the full ton 30/35 models, V30/35 regular cab dually, and crew cabs through 1991 (built at Janesville), and SUVs (Chevrolet K5 Blazer and Suburban, built at Flint) through 1991"
http://en.wikipedia.org/wiki/Chevrolet_C/K

[VileZambonie]

Topp, what are you trying to say?  

That in 1988, the Newbody style was introduced ONLY on the 1500 series Pickup...  The 2500/3500 kept the old nose found on the suburban for 89-91, hence the OP does not have a 1990 truck (at least the pic he posted) as that front end was ONLY on the 1500 series truck for 1990, and not the 3500 series for 1990.

"After 1987, R/V remained in use for the full ton 30/35 models, V30/35 regular cab dually, and crew cabs through 1991 (built at Janesville), and SUVs (Chevrolet K5 Blazer and Suburban, built at Flint) through 1991"
http://en.wikipedia.org/wiki/Chevrolet_C/K

That is incorrect. -The C/K series was available in 3500 as well.

[topp]

That is incorrect. -The C/K series was available in 3500 as well.

Until 1991, the 3500 series was in the old body style ONLY(89-91 Blazer and suburban nose.).


I have posted SEVERAL links.  I have NEVER seen or even know anyone (on over 10 chevy forums) who has/believes or has any evidence that is contrary.
The 1988 pickup bodystyle change was ONLY on the 1500.

I am not talking the C/K R/V designation.  I am talking about the NOSE of the truck, the fascia, the body lines.

[VileZambonie]

http://cgi.ebay.com/ebaymotors/1990-chevy-3500-1-ton-dully-4x4-454-automatic-x-cab-/150548891455?pt=US_Cars_Trucks&hash=item230d69c73f#v4-38

[topp]

Interesting...  Never seen one before...

I found this- http://cgi.ebay.com/ebaymotors/Chevrolet-Silverado-3500-SILVERADO-1990-CHEVEROLET-CREW-CAB-4X4-_W0QQcmdZViewItemQQhashZitem1e60f4e891QQitemZ130475681937QQptZUSQ5fCarsQ5fTrucks

1990 Old nose....
Can not be transplanted, since the newer body style was narrower...
Any clue??

[88_50]

Vile, It has a TH400. I really wished it had an Overdrive trans. I think that will be the next major mod after this engine. Thanks for the advice for the heads. I'm thinking about just puling his engine and replacing the pistons and rings. Ive seen rings stick in pistons when over heated too much. I dont think he is telling me the truth on how far he drove it like that. But he did say the temp gauge was buried. Changing the pistons will also give me a chance to get the CR up to 90-9.5 range. It will also let me put a good set of rings in.


LOL at everyone discussing what the truck is. Its definitely a 1990 C3500 2 wheel drive gas hog. But its a nice one.                       

[Layne]

LOL at everyone discussing what the truck is. Its definitely a 1990 C3500 2 wheel drive gas hog. But its a nice one.                       

Glad you have a sense of humor about it.
On a side note, my buddy had a 89 4X4 2500 that was nbs and my 88 2wd 1500 sierra is nbs...

[88_50]

LOL at everyone discussing what the truck is. Its definitely a 1990 C3500 2 wheel drive gas hog. But its a nice one.                       

Glad you have a sense of humor about it.
On a side note, my buddy had a 89 4X4 2500 that was nbs and my 88 2wd 1500 sierra is nbs...

Yeah, my son is shocked by my attitude especially for the money Im about to put in it. But I look at it like this, as long as he learns from his mistake and pays better attention, all is ok. He also knows everything he breaks I stand over him and make him fix. Everything from his dirtbike to his truck. Thats the only way I can make him learn to appreciate and take care of stuff. He wouldnt respect anything if Dad fixed everything he broke. Besides, I think its good for him to learn how to fix his stuff. Dad wont be around forever.

NBS is definitely something Im going to do to the truck when I get home in April. Its amazing how much a quick front end change makes the truck look so much better.