45mm inlet and Plenum base inc 72 mm throttle pot.
Discussion
You would need the high temp stuff here. Friday was having a puncture repaired and the car sat in the sun while waiting the body was too hot to hold you had one. Today the temp was 10-19 degrees ................... T-Shirt weather. it's cooling off now so lit the fire in the front room to ward off the evening chill as it's nearly 5pm now here.
Lats July it got to 45 degrees here.
Now back to inlets ................................ have been wondering about those nice polished machined billet plenum bases. Thoughts being how would the 430 like one of those? Effects positive of negative?
Oh well less than 4 weeks to go now.
Lats July it got to 45 degrees here.
Now back to inlets ................................ have been wondering about those nice polished machined billet plenum bases. Thoughts being how would the 430 like one of those? Effects positive of negative?
Oh well less than 4 weeks to go now.
Brithunter said:
Now back to inlets ................................ have been wondering about those nice polished machined billet plenum bases. Thoughts being how would the 430 like one of those? Effects positive of negative?
Oh well less than 4 weeks to go now.
My 430 certainly likes it’s blendid base. I have the 45mm version and also opened up the inlet manifold to match as it initially went on a 5ltr. Unfortunately I don’t have before and after figures but Jools says they are worth 10 bhp. Oh well less than 4 weeks to go now.
Thank you carsy, the intention is if we do this to have a ported manifold as well and a larger throttle body even if the larger throttle body only improves throttle response it would be worth it fr that reason alone. However as I have not driven her yet this is all "in the wings" so no rush.
Brithunter said:
Thank you carsy, the intention is if we do this to have a ported manifold as well and a larger throttle body even if the larger throttle body only improves throttle response it would be worth it fr that reason alone. However as I have not driven her yet this is all "in the wings" so no rush.
I would very much drive it first, perhaps for this year, and then see. IMHO you can spend an awful lot of money for very little gain if you are not careful. I reckon that much less than a 50 bhp gain is not really worth the money it will costQBee said:
I would very much drive it first, perhaps for this year, and then see. IMHO you can spend an awful lot of money for very little gain if you are not careful. I reckon that much less than a 50 bhp gain is not really worth the money it will cost
Improved throttle response is of more interest really.
What he says ^^^^^ this will make little difference without bigger heads.
Two hours with cheap throw away drill attachments and it’s starting to look ok.
You can see the contrast in colours from the Trumpet base and thermostat housing.
Better light
Two hours with cheap throw away drill attachments and it’s starting to look ok.
You can see the contrast in colours from the Trumpet base and thermostat housing.
Better light
Edited by Classic Chim on Saturday 10th March 20:24
Classic Chim said:
I’m regretting it now 
Takes ages but with a new small attachment I’ll be able to finish off in the nooks and crannies.
Looks great in the flesh.
Takes a real enthusiast to brag about his small attachment Takes ages but with a new small attachment I’ll be able to finish off in the nooks and crannies.
Looks great in the flesh.
See you both on Saturday. I will be bringing a bag of bits to fit and some tools. Got to keep myself occupied while you two talk diffs.....
QBee said:
Takes a real enthusiast to brag about his small attachment
See you both on Saturday. I will be bringing a bag of bits to fit and some tools. Got to keep myself occupied while you two talk diffs.....
Can’t wait to see these tools See you both on Saturday. I will be bringing a bag of bits to fit and some tools. Got to keep myself occupied while you two talk diffs.....
If anything like mine they will be full on Mickey Mouse.
I might bring my CupraR spoiler if I haven’t fitted it first.
The idea is to slam Peters car together so we have access to the lift
I better get there early doors then
No probs.
I’ve just read on another thread saying you get a lot more torque with ported heads,,,, interesting as I do like torque.
Something that sort of concerns me about going to 45 mm inlet tract is how the air is going to be slower at low revs and with less pressure, high air speed = Better atomisation.
Or am I just freeing up the air to actually speed in faster. Looking at the inlet ports on the manifold it seems all I’m doing is increasing the size quite marginally in essence and straightening out the flow to the heads where I can. Reading about how fuel and air travel it’s obvious you just want a consistent straight line from trumpets to heads as best you can get it. Smoothing out the flow is probably as important as opening up the size.
Tracts 1 and 8 on the manifold look like the ones that need the most work as it’s like an S bend. I’ve been Looking at how thick the casting is as I know Simon went to far on one.
As little as 3 mm to play with but about 5 mm thick in places so,that sort of governs what I can do. Just shine a torch down the inlet ports and it’s easy to see 1 and 8 are not good.
I’m also feeling this is a waste without porting the heads to a decent size as that seems to be where the big restriction actually is then matching the inlet manifold to the heads.
We’ll see
I’ve just read on another thread saying you get a lot more torque with ported heads,,,, interesting as I do like torque.
Something that sort of concerns me about going to 45 mm inlet tract is how the air is going to be slower at low revs and with less pressure, high air speed = Better atomisation.
Or am I just freeing up the air to actually speed in faster. Looking at the inlet ports on the manifold it seems all I’m doing is increasing the size quite marginally in essence and straightening out the flow to the heads where I can. Reading about how fuel and air travel it’s obvious you just want a consistent straight line from trumpets to heads as best you can get it. Smoothing out the flow is probably as important as opening up the size.
Tracts 1 and 8 on the manifold look like the ones that need the most work as it’s like an S bend. I’ve been Looking at how thick the casting is as I know Simon went to far on one.
As little as 3 mm to play with but about 5 mm thick in places so,that sort of governs what I can do. Just shine a torch down the inlet ports and it’s easy to see 1 and 8 are not good.
I’m also feeling this is a waste without porting the heads to a decent size as that seems to be where the big restriction actually is then matching the inlet manifold to the heads.
We’ll see
Edited by Classic Chim on Wednesday 14th March 00:01
Gassing Station | Chimaera | Top of Page | What's New | My Stuff