Classified Ads: Swap Parts Here!

Hi. I have 1975 mgb with a buick 300 with RV-8 headers. But I wanted my 1974 mgb to be a little less powerfull and I found a rebuilt buick 231 with a 20 bolt pan. I wanted to increase the power of the v6 and got a edelbrock manifold,Holly 390,aluminum flywheel and designed a BV-6 headers but used racecar technology with a twist. The little twist can take the buick v6 to a new level of performance. Block hugger headers lose over 10 hp but the BV-6 headers will gain hp. If anyone is interested, I can get some more made. By the way, Edelbrock claims that their manifold can get about a 50 hp gain. A 200 hp v6 sounds good to me .

> Edelbrock claims that their manifold can get about a 50 hp gain.

That wasn't due to the intake manifold alone. Their test engine consisted of an
even-fire 231 Buick V6 with 1979 and up tall port heads, Edelbrock Performer intake
manifold (p/n 5486), 500 CFM AFB carb, 1 1/2" primary diameter headers and Performer
Plus cam (p/n 5487) with the following specs:

204/214 degrees duration @ 0.050" lift
280/290 degrees advertised duration
0.448" / 0.472" valve lift
112 degrees LSA, installed on a 107 degrees ICL
Claimed idle vacuum is 15".

> A 200 hp v6 sounds good to me.

In their catalog, Edelbrock shows a comparison plot of their test engine and a
stock engine but note they plot torque, not power. Eyeballing the plot, the
peak torque is 220 ft-lbs at 3000 RPM. Plotting the torque for other RPM and
converting to HP shows a peak power of around 167 HP between 4500 and 5000 RPM.

Most of the Buick V6 intake manifolds, including GM's 4.1L Buick V6 four barrel,
are single plane manifolds while the Edelbrock is a dual plane design. It's a
little odd that Edelbrock chose to go with a dual plane. The dual plane design
was designed to compensate for the adjacent cylinder firing reversion problem
that non-flat plane crank 90 degree V8s suffer from. Being a V6, the Buick 231
doesn't have that problem.

I used to mess around with Buick V6s a bit and typed up some test data that you
may be interested in. It probably doesn't belong in the classifieds so I'll
put it in the Engine and Transmission Tech forum.

Dan Jones

Steve, the 300 was too powerful and now you want 200 hp from a Buick V6, to swap in there ? Might be easier to pull a couple plug wires off the 300. Good Luck with your logic, roverman.

I probably should have done something earlier. The original post doesn't read like a classified ad, so it's no wonder we've veered off-topic. Unquestionably, these headers would be a huge asset to anyone doing a Buick V6 swap! I'd hazard to say that IF these headers had been available ten or fifteen years ago, we'd see a whole lot fewer 60-degree V6 installations today. Not that there's anything wrong with the skinnier GM V6s, but Buick's V6 has its own unique advantages. Until now, appropriate off-the-shelf headers were the biggest question mark.

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Steve, can you give potential buyers a ballpark price and a leadtime estimate?

Buick 231 headers customed made for $450 plus shipping. Three week manufacture time. Grand Junction, Colorado