33 replies to this topic

[ads7]

Thanks for the link, I've emailed them asking for the inlet internal diameter ?

[ads7]

Meanwhile if anyone has a nice cheap standard cast inlet/exhaust manifold let me know please

Edited by ads7, 20 November 2019 - 06:34 PM.

[ads7]

Trying to post photos ..

Edited by ads7, 04 December 2019 - 04:31 PM.

[ads7]

So I now have all the exhaust parts for a small bore exhaust setup :

1. Bagged a small bore cooper freeflow manifold on eBay - the outlet fits the 1 1/4" bore standard system perfectly, result!

2. Cut back box off and replacing with Mk1 sprite centre exit - this is 1 1/2" so will buy an adaptor to step down to 1 1/4" for £4 at my local motor store . The whole lot has cost me £40.I'll fit it after the weekend and report back here.

Meanwhile if anyone wants a 2" bore single box stainless system message me. I'm in Oswestry Shropshire

[ads7]

Looking forward to a more sutble sound and a little more go

Edited by ads7, 04 December 2019 - 04:30 PM.

[nicklouse]

So I now have all the exhaust parts for a small bore exhaust setup :

1. Bagged a small bore cooper freeflow manifold on eBay - the outlet fits the 1 1/4" bore standard system perfectly, result!

2. Cut back box off and replacing with Mk1 sprite centre exit - this is 1 1/2" so will buy an adaptor to step down to 1 1/4" for £4 at my local motor store . The whole lot has cost me £40.I'll fit it after the weekend and report back here.

Meanwhile if anyone wants a 2" bore single box stainless system message me. I'm in Oswestry Shropshire

oh dear. that step down will not help one little bit.

[ads7]

Ha was that comment a bit tongue in cheek or did I just confuse?

It's actually a step up from the 1 1/4 centre pipe up to the sprite rear box. Remember it's only an 850 so we want to keep gas velocity up as far along as possible, couldn't do much about the rear sprite box but shouldn't really harm

Edited by ads7, 04 December 2019 - 07:40 PM.

[ads7]

Old 2" stainless system on eBay now for £30 buyer collects from Oswestry

[ads7]

Today I had a half day free to fit the new system.

Some issues to be aware of

first, the freeflow manifold fouled the fuel pump outlet so I had to remove rotate and refix the pump top, still not totally happy as the fuel outlet still runs only a few mm away from the exhaust manifold. I'm running braided fuel hose bit even so you can't be too careful.

Second, the sprite rear box tailpipe is too short, emerging only just behind the rear valance lip. I may just add a chrome tailpipe.

Third, with the oe middle silencer still in place, it's probably too quiet for me. sounds like the stock system. I can see myself on the lookout for a used single box 1 1/4" oe system to chop up for the middle pipe without the middle silencer.

Perhaps it will grow on me as it stands I'll see how it goes. Should be marginally more lively than the previous ridiculously oversized 2" system. Definitely liking the center exit look

[cal844]

If you have an LCB exhaust it will be tight at the fuel pump, you'll need a free flow 3 into one manifold.

Hope this helps


Cal

Edited by cal844, 13 December 2019 - 10:24 PM.

[ads7]

If you have an LCB exhaust it will be tight at the fuel pump, you'll need a free flow 3 into one manifold.

Hope this helps


Cal

Thanks.If you check the post you'll see I used a freeflow

Edited by ads7, 14 December 2019 - 08:33 AM.

[ads7]

Does anybody have an old standard single box exhaust kicking around? The centre box grounds on our new driveway

[ads7]

Just had the new setup running with single sprite box. Basically a bit too quiet for me if I'm honest it sounds standard.

Once the car is motd I'm hoping it should run better than the previous drainpipe affair. Every fraction of a bhp helps with an 850

[ads7]

Back on the road and does run well. Can't tell if performance has improved but she sits comfortably at 60. Good enough for me

[whistler]

 

 

Thanks guys for your input. Maniflow freeflow seems the way to go agreed.

I'd still appreciate some viewpoints on the sprite back box

 
Do you mean an Austin-Healey Sprite Mk I? The "Frogeye"?

Yes the frogeye. It's a bit old school but I noticed Clive Trickey recommended this.

 

Back in Clive Trickey's days we used to use an MGB centre box as a back box. It was oval but very shallow and didn't get ripped off so easily as the standard cooper box.