-
The Z Club relies on the support of it's paid members - join the club or renew your membership here.
Manifold design
- Thread starter jay28
- Start date
Ian Patmore
Well-Known Forum User
Good Jay,
Maybe worth while seeing how your inlet manifold fits with your manifold, especially regards thickness and fixing. Much easier here than on the car.
Maybe worth while seeing how your inlet manifold fits with your manifold, especially regards thickness and fixing. Much easier here than on the car.
jay28
Well-Known Forum User
Well Ian you were indeed right, I went to bolt my carbs and intake to the dummy head to see how it would fit and it didn't 
the bottom of the middle carb is sitting on top of NO 3 and 4 primaries.......I'm going to have to modify them tomorrow 
Oh well I'll know the next time
the bottom of the middle carb is sitting on top of NO 3 and 4 primaries.......I'm going to have to modify them tomorrow Oh well I'll know the next time
Ian Patmore
Well-Known Forum User
Jay,
Don't worry too much, as this can be a frequent problem. This is why I suggested it before final fitting. At least it is easier to sort off the car.
Don't worry too much, as this can be a frequent problem. This is why I suggested it before final fitting. At least it is easier to sort off the car.
Dale
Club Member
Well I picked up the car from AAS this afternoon. I can't really tell how performance is as the cars running a bit wrong at the moment, but it does sound brilliant!
As you've probably gathered, I'm not especially technical, so all this 'science' goes a bit over my head, but for your info the primaries are 1 3/4" and the system 2 1/4. I'd have liked some photos of the header before it was attached to the car, but they 'forgot'! From the photos attached you can't really see anything, although they do show where the poor running is coming from. You can see that cylinders one and five aren't generating as much heat as the rest, as the fresh manifold metal isn't tarnishing as quickly on those two, So there's my next job!
As you've probably gathered, I'm not especially technical, so all this 'science' goes a bit over my head, but for your info the primaries are 1 3/4" and the system 2 1/4. I'd have liked some photos of the header before it was attached to the car, but they 'forgot'!
From the photos attached you can't really see anything, although they do show where the poor running is coming from. You can see that cylinders one and five aren't generating as much heat as the rest, as the fresh manifold metal isn't tarnishing as quickly on those two, So there's my next job!
SeanDezart
Well-Known Forum User
Looks like a copy of a Janspeed system (see photo). Or a Fourways manifold (2nd photo).
I thought the advice here was 1 5/8 primarys on road and especially 'small' cc engines ?
First job Dale is to get some bigger, deeper air filters - ask Mr F.
I thought the advice here was 1 5/8 primarys on road and especially 'small' cc engines ?
First job Dale is to get some bigger, deeper air filters - ask Mr F.
Last edited by a moderator:
Dale
Club Member
I let them have free reign to be honest. I don't know 'owt about manifods, but they do. I really don't mind if it's not 'absolutely the best possible design', it'll do for me.
I did tell them that I'd eventually upgrade the engine for fast road use, so maybe that's why they went for 1 3/4"? Opinion seems mixed anyway.
As Sean has said though, I need some better air 'in' now!
SeanDezart
Well-Known Forum User
I'm not convinced that they do know what they're doing with an L series engine - why haven't they joined the two pipes further back - especially if you said that you'd be upgrading the engine later ?
Why not go for twin 2"SUs instead, for road use they're more than adequate and keep the classic look ?
SeanDezart
Well-Known Forum User
It's gone quiet......
as long as you are happy with it Dale that is all that matters,it all looks very to me !!!!!
samuri-240
Well-Known Forum User
Looks good to me 
there is too much bo**ocks talked on here about what is best, if you are after every last ounce of power from the engine then fair enough you may have to take some of the ba**ocks on board . Rob Gaskin has a GDS manifold on his reasonably mild car & leaves the Carlos Fandango's for dust :lol:. Dale as Sean has mentioned 2" SU's is another option for carbs, I had a moded 2.8 fitted with 2" SU's & GDS manifold & system once it was a beast of a car , but if you can afford triples they are worth it for the sound alone .
there is too much bo**ocks talked on here about what is best, if you are after every last ounce of power from the engine then fair enough you may have to take some of the ba**ocks on board . Rob Gaskin has a GDS manifold on his reasonably mild car & leaves the Carlos Fandango's for dust :lol:. Dale as Sean has mentioned 2" SU's is another option for carbs, I had a moded 2.8 fitted with 2" SU's & GDS manifold & system once it was a beast of a car , but if you can afford triples they are worth it for the sound alone .
jay28
Well-Known Forum User
Well I made up the rest of the exhaust today.........all was well until I let the car down off the jacks.........one of the pipes is only 1 inch off the ground.............Forgot how low my car is!!
I'll have to try fix it tomorrow at some stage if I have time, But the sound is great
I'll have to try fix it tomorrow at some stage if I have time, But the sound is great
