Mk3 Cavalier Owners Club | Vauxhall Cavalier Dot Com

A few shots of my Cav 3 litreV6.
Main aim is to get it as fast as poss down the 1/4 mile.Currently at 14.4@98mph.
I want to keep it a standard looking as possible.



3 litre going in.


New exhausts i'm fitting




New manifold flange i'm making.

turbo wheels look ace. what's the manifold, one you made? good work, look forward to progress

Manifolds are from a Ford probe V6,made of stainless, bought new off the bay for £130.

Your not in the cheshire area are you as turbodan thinks he spotted you?

No i'm in Rugby, Junc 1 of the M6.
I think Dan saw my car at Santa Pod in october?

yea you parked next to our cars, whats the plan with the exhaust next 2.5" system to match?

Already got a Scorpion stainless system all through with a decat, not sure what size it is?
The Probe secondaries are pretty good in that they are equal lengths front to rear banks, where as the std Cav V6 are unequal. Once the primaries are done i'll move on to these.

they tend to be 2" nothing special.

the exhaust design on vauxhalls tends to be made to a budget rather then power, goes to show what can be achieved

Once again possibly giving egg sucking lessons again but read somewhere manifold pipes should be 110% of cylinder capacity, hope this helps. Allows for best airflow and minimal pressure prior to cat.

There is loads af science behind exhaust pipe design, size and lengths, you could spend ages working out what is best for any engine. I think these pipes are probably too short, an engineer at work reckons 600mm would be about right, failing that go for 300mm which these are.
The sizing is a compromise between being too big which will give you high flow, but low velocity and too small will be restrictive but high velocity. The port size on a V6 is roughly the same area as the 1 5/8 dia pipe in this system so that persuaded me it was about right.Looked at a load of stuff on yankee websites and they would tend to say 1 1/2 was right, but that looked too small to me.
Also much depends on packaging it all under the bonnet, 600mm pipes may be good,but they would end up being more expensive to make. I might look at this though once i've made this set.
However, I think that anything has got to be better than the standard manifold.

you're not wrong, the stock v6 manifolds suck. if you'll excuse the pun.

This is where i have got to so far with the flanges.This weekend i'll remove some of the excess material.

Looking really good, i suppose im spoilt having an xe as you can pick up flanges off ebay/forms really easy

The completed flanges and the first pipe tacked in.

Front manifold almost finished.

nice work, but thats a lot of cak on there!

Its only a spare engine I've got on a stand in my garage.But yes,it is covered in cak

phew! for a split second i thought you were fitting those shiny new manifolds onto that filthy old lump and then sticking it in the car haha!

The completed front manifold(minus crud covered engine)

very very nice!

Finished my manifolds, just the downpipe to do.

They look awesome...

Very nice mate.

Finally finished the pipes,hopefully get them fitted next weekend.

Sweet! Fancy making me and Sqiug a set????