Club 80-90 Forums

My recently purchased 1987 Autosleeper DG1.9
LPG with autobox is running early manifolds and a stainless silencer twin tailpipes.
In your opinion will this set up gain or restrict bhp?
To my feel it is restricting.

I read somewhere that if I ran my 2.1 dj on an early exhaust system, then it would lose approx 10 bhp.

102bhp compared to 112bhp with the later exhaust system.

In English money, approx 9% reduction overall.
So that sounds like a restriction to me.

I suppose it depends on how much gain in bhp your twin exhaust has over the "standard" early exhaust.

Three campers' earlier (my first) ran early pipes and original single tailpipe. And that ran absolutely fine.
The engine is sound. The autobox plus LPG robs a bit of power, and yet compared to my other camper, a DJ2.1 on E10 it feels very stifled.
I guess a compression test is the way to go.

If you weren't used to the 2.1 previously, then maybe that is why the 1.9 feels stifled.
It is a much lower bhp compared to the 2.1.

It will be like the 2.1 running on 3 cylinders but without the lumpiness of a mis-fire.