New here, 1970 142S exhaust question

[VolvoMike]

Hello,
just found the forum and had a question. I apologize if this is posted in the wrong forum, and ask moderators to please move accordingly. I have a 1970 142S with a freshly rebuilt B20, D-cam, M40 gearbox, and a Weber 32/36 DGV carb. I would like to buy the 2,5 sport system from Skandix and have a local shop fit it up. I plan on adding a competition cylinder head, 4-1 exhaust header, 38/38 weber, etc. at a later date as finances permit. Has anyone have/had experience with the skandix sport system? Right now I am running the full-length stock exhaust with a straight pipe in place of the rear silencer It sounds good, a bit raspy at some rpms, but how does the skandix system sound? thanks in advance.
Mike

[classicswede]

Hi Mike for the spec of you engine the 2.5" exhaust would be to big and cause a drop in low end power. For what you have I would go with a 2" opening out to 2.5" for the back box or 2 1/4 straight through system. The 4 branch is a good idea - not much power gain but it does stop the exhaust popping on over run. Never used the scandix stuff so no idea on quality.

[Snowman]

I had the Simons system on my 140, I think that was 2" and followed the line of the original crossing across the back axle. Sounded better than the original marginally and went fine.

I've now got a 2.25" bespoke stainless system made up going dead straight with two boxes. Feels much more perky but that could just be the noise. Thats on a well modded engine with SU's.

[VolvoMike]

Originally Posted by classicswede

Hi Mike for the spec of you engine the 2.5" exhaust would be to big and cause a drop in low end power. For what you have I would go with a 2" opening out to 2.5" for the back box or 2 1/4 straight through system. The 4 branch is a good idea - not much power gain but it does stop the exhaust popping on over run. Never used the scandix stuff so no idea on quality.

Thanks for the reply, I thought the 2.5" would be too large with my current setup, but I plan on doing other modifications in about a year so is the 2" going to be too small once I add more carburation, better cylinder head, 4-1 exhaust header, etc.? Skandix offers two systems in the USA, so I'm torn between the two. I

[VolvoMike]

Originally Posted by Snowman

I had the Simons system on my 140, I think that was 2" and followed the line of the original crossing across the back axle. Sounded better than the original marginally and went fine.

I've now got a 2.25" bespoke stainless system made up going dead straight with two boxes. Feels much more perky but that could just be the noise. Thats on a well modded engine with SU's.

Unfortunately, classic Volvos are not too common here in the States, so there's only a couple of choices as far as aftermarket exhaust systems. I could buy two mufflers and have a shop fit it all together, but the simons system has mandrel bent tubing which maintains inner diameter throughout the whole system. I'd love to go stainless, but that may be a little out of my budget. Thanks!

[Snowman]

Originally Posted by VolvoMike

Unfortunately, classic Volvos are not too common here in the States, so there's only a couple of choices as far as aftermarket exhaust systems. I could buy two mufflers and have a shop fit it all together, but the simons system has mandrel bent tubing which maintains inner diameter throughout the whole system. I'd love to go stainless, but that may be a little out of my budget. Thanks!

Ah!! Norfolk VIRGINIA not the East coast of England! Sorry Mike. Getting mine made from scratch from the manifold back cost just over £300UKP including fitting from a specialist exhaust shop together with skid guards. As it has a lifetime warranty, didn't seem bad value.