2.4 Inlet General 2.4 Inlet Manifold Questions
- Thread starter alanoo
- Start date
I've been shopping at the local scrap yard 
A load of tubing
The all important valve from a Corsa. They didn't even charge me for any of it either
A mate has got me the ally plate for the bracket so I just need the 10.5ID servo pipe... Oh and the inlet manifold! cheers.. [/img]
A load of tubing
The all important valve from a Corsa. They didn't even charge me for any of it either
A mate has got me the ally plate for the bracket so I just need the 10.5ID servo pipe... Oh and the inlet manifold! cheers..
[/img]markv said:
I must admit this is one MOD that confuses me. by moving the FPR pipe below the butter fly it has the total opersite affect of it being above notsure.gif Instead of vacuum when throttle open its there when closed dunno... So in theory higher fuel pressure when idleing and lower when accelerating??
vocky
Staff
blue se2 said:
the z22se fpr increases fuel pressure WITH vacuum :?
so if you modify the inlet system you loose ALL vacuum to the fpr, so no increase in fuel pressure
you have two options:
one; leave it as it is and have 3 Bar of fuel pressure all the time
two; do the fpr mod and have 4 Bar of fuel pressure all the time
with a modified engine you will loose power because you won't have enough fuel pressure :roll:
andyroo
Member
:? The corsa I stole some pipe from had 12.5mm silicone servo pipe which came off with a bit of pulling... it was quite tight and showed the serated edge of the valve through the thin wall, but it certainly wasnt heat shrunk! According to Vocky (all hail) the thin walled (about 1-2mm thin) silicone pipe is better than the rubber stuff as it doesnt split...Muncher83 said:
The scrappy should have plenty of the pipe youre after. As its 5m minimum order at nearly £20 a metre from Vaux for the 12.5mm stuff, I don't see how else you'll get it in 12.5mm
Lightning Coupé
Senior Member
Just to through a spanner in the works, The 12.5mm plastic pipe wont fit over the nipple on the intake manifold, its more like 15mm on mine. I am going to use a 1" long pice of 15mm ID rubber pipe between the manifold nipple and the plastic plug that conects the vac hose to your brake servo cylinder. The servo cylinder plug converts the vac pipe down from 15mm to 12.5 or 8mm depending what was fitted to the car you pull it out off. I took a couple of these from the scrappie when I went hunting valves down on the off chance they would come in usefull and they do! Ill get pics up later. I also have a couple of spare one way valves including one with 2 extra spurs for those with a vecy if anyones stuck.
Lightning Coupé
Senior Member
Sorry chaps, I was wrong The 2.4l manifold nipple is 13.5mm OD not 15mm, the rib on it measures 15mm though and its bloody hard work pushing the rigid plastic pipe over it, if not impossible, I boiled the pipe for 5mins and still couldnt get it over. I'll post up what I'm using in a minute.
I dont know about cutting the original npple off, it could work perhaps? dunno.. But I've always kept my original bits so I can put the car back to standard for any reason and dont really want to try it. Ill have a look for you tomorrow though. Thats the big day it all gets fitted! I was going to do it earlyer, but the car wasnt running right since I changed the hydrolic lifters and wanted to get that sorted first. I stripped it down again today and found I'd set the timing chain a tooth out That explained the lumpy idle and why it went like a rocket at high revs, Id advanced the timing! lol.
The 2.4l manifold nipple is 13.5mm OD not 15mm, the rib on it measures 15mm though and its bloody hard work pushing the rigid plastic pipe over it, if not impossible, I boiled the pipe for 5mins and still couldnt get it over. I'll post up what I'm using in a minute.I dont know about cutting the original npple off, it could work perhaps? dunno.. But I've always kept my original bits so I can put the car back to standard for any reason and dont really want to try it. Ill have a look for you tomorrow though. Thats the big day it all gets fitted!
I was going to do it earlyer, but the car wasnt running right since I changed the hydrolic lifters and wanted to get that sorted first. I stripped it down again today and found I'd set the timing chain a tooth out That explained the lumpy idle and why it went like a rocket at high revs, Id advanced the timing! lol.
Lightning Coupé
Senior Member
The black braided pipe is 12.5mm rubber pipe that fits very snug, It goes on real easy but I had to cut the first piece off to get it apart again lol. Using the brake servo fitting means I can keep the original 8mm vac hose through the rest of the system
