5.0 GL Volvo hop up?

[Leardriver]

Hi all!

I was reading old posts about this, but never got a definitive answer.
Has anybody put a 4 bbl on a GL 5.0? I hear that the manifold already accepts one, so bolting on a small 500 CFM should be quite possible.
Holley's carb selector program calls for a 450 CFM on a 305 CI spinning at 4800 max RPM.
On the 4.3, there are plenty of posts telling us exactly which carb and manifold to put on, with about a 25 HP increase.
Any experience doing this on the 5.0? Results?

 

[John_S]

Re: 5.0 GL Volvo hop up?

You haven't identified exactly what your engine configuration is, but here is a recent thread: http://forums.iboats.com/showthread.php?t=396275

 

[Leardriver]

Re: 5.0 GL Volvo hop up?

It's an '01 5.0 Volvo GL-A
I did see the first part of that thread but somehow missed the rest.
I'm a little surprised that this 4 bbl change hasn't been done many times. If the manifold is already compatible and you can just bolt on an Edelbrock 1409, this is a one hour change.

 

[180shabah]

Re: 5.0 GL Volvo hop up?

Not a big deal to make the change, then a little fine tuning.

I think most people just don't want to spend the money for a relatively small increase in power.

 

[John_S]

Re: 5.0 GL Volvo hop up?

It's an '01 5.0 Volvo GL-A
I did see the first part of that thread but somehow missed the rest.
I'm a little surprised that this 4 bbl change hasn't been done many times. If the manifold is already compatible and you can just bolt on an Edelbrock 1409, this is a one hour change.

As you saw in the thread, I was surprised by the results. I would be interested if you found other engine differences between the carbed and TBI.

Given there wasn't any improvement, why would you change?

 

[fossill]

Re: 5.0 GL Volvo hop up?

You haven't identified exactly what your engine configuration is, but here is a recent thread: http://forums.iboats.com/showthread.php?t=396275

This quotation sums it up from his upgrade:

Re: How much HP would be gained adding 4bbl to 5.0L Volvo GL Vortec?

--------------------------------------------------------------------------------

Drum roll please! badumbadumbadaumbadumbadumbadumbadumbadum....

And the answer to the question asked in the title of this thread:
How much HP would be gained adding 4bbl to 5.0L Volvo GL Vortec?

ZERO.

That's right.

ZERO.

 

[Leardriver]

Re: 5.0 GL Volvo hop up?

Thanks for the replies.

My tiny brain just surmised that if fuel injection added 40 HP, then addng a little more fuel would boost the power a little. The experiment was done logically and methodically, though.

I don't know if the gain, if it exists, would be expensive. I was expecting 25 HP for $250 bux, and I would take that deal anytime.

I would love to see that test boat purposely overpropped, like a 23 pitch 3 blade, and then see if the results were identical still. I am suspecting that the prop used was at the edge of its efficiency. Anyway, fun stuff!