Discussion
benjj said:
I wouldn't expect to get any gains what so ever from a manifold itself, but combined specifically with polished & ported head plus a cam swap (and middle box delete) it would surely allow the other bits to do their thing to the best of their ability?
I've done all that on my M30 and it gave exactly nothing. Took it elsewhere for a Unichip and live mapping and that got me some.Wait until you get the head off, I bet you that it is the head gasket.
Did the engine builder skim the head and if so did they use the thicker gasket?
The head gasket can go without showing the usual symptoms, it usually goes between the combustion chambers.
This happened to me years ago when I rebuilt mine. I feared the worst and mine had been treated to a new head!
Put it back together with the correct gasket and never had another problem and is believed to be still running.
Not much help I know but hope you get it sorted.
Did the engine builder skim the head and if so did they use the thicker gasket?
The head gasket can go without showing the usual symptoms, it usually goes between the combustion chambers.
This happened to me years ago when I rebuilt mine. I feared the worst and mine had been treated to a new head!
Put it back together with the correct gasket and never had another problem and is believed to be still running.
Not much help I know but hope you get it sorted.
I opted for some flow work, e34 valves (1mm bigger) and a Cat fast road camshaft. Schrick were too expensive for me. I also went with the Fritz manifold and triple 45's, as the old injection is a limiting factor when it comes to performance gains. This lot was crammed into an e21 though obviously. 
Fritz talk utter s
te when it comes to their performance gains etc. Even the manifold I bought from them had to be modified to fit properly. I would suggest www.zeroexhausts.co.uk as their work is top draw. I'm fitting their manifold to my e30 M3, but I'd happily have one on the wall in the lounge. 
Fritz talk utter ste when it comes to their performance gains etc. Even the manifold I bought from them had to be modified to fit properly. I would suggest www.zeroexhausts.co.uk as their work is top draw. I'm fitting their manifold to my e30 M3, but I'd happily have one on the wall in the lounge. Edited by e21Mark on Thursday 10th April 21:36
benjj said:
Jesus wept. That looks so awesome.
What sort of grrrrrrrunt is it producing?
Around 260 brake. Some great induction noise too.What sort of grrrrrrrunt is it producing?
Another option is m88 ITB's using inlet adaptors that are available from Germany.
I wouldn't be surprised if you just had a failed head gasket though.
Michael fixed that when I was away. I'll ask him - am over at workshop this morning to take the head off the E12, then back home to prep the Porsche before I leave for France at small o' clock for a rally. Busy day.
Feeling positive. This beemer will capitulate and will be simply epic.
Feeling positive. This beemer will capitulate and will be simply epic.
e21Mark said:
Around 260 brake. Some great induction noise too.
Another option is m88 ITB's using inlet adaptors that are available from Germany.
I wouldn't be surprised if you just had a failed head gasket though.
Out of interest, which dyno did you test it on?Another option is m88 ITB's using inlet adaptors that are available from Germany.
I wouldn't be surprised if you just had a failed head gasket though.
I've looked into the M88 ITB option, but couldn't find any for sale. If you see a set...
Think we've nailed down the problem today.
Head off:
The HG was fine if a little on the fat side meaning overall compression was reduced. The bores hadn't been honed during the rebuild and there is a bit of a lip on each thrust side but not a total catastrophe. What was poor was the work done by Olly's garage, wish I could name & shame thes but I don't know who they were! Gaskets on the intake and exhaust manifold mixed. I don't mean they got the sides wrong, 2 exhaust and one inlet gasket on one side, the opposite on the other. These are plainly different gaskets. wkers.
Now the good bit. Both inlet and exhaust valves on Cylinder 1 are jiggered. Michael filled with oil and said we'd leave overnight. However just 10 minutes later the level had dropped and you could see in the ports that both were leaking. wkers. Not entirely sure if they're bent or they've not been lapped in (properly if at all) but either way it explains the 25% drop in compression on that pot.
So, €300 spent on replacement parts plus labour, this is going to be a biiiiiig job.
bds.
Head off:
The HG was fine if a little on the fat side meaning overall compression was reduced. The bores hadn't been honed during the rebuild and there is a bit of a lip on each thrust side but not a total catastrophe. What was poor was the work done by Olly's garage, wish I could name & shame the
s but I don't know who they were! Gaskets on the intake and exhaust manifold mixed. I don't mean they got the sides wrong, 2 exhaust and one inlet gasket on one side, the opposite on the other. These are plainly different gaskets. wkers.Now the good bit. Both inlet and exhaust valves on Cylinder 1 are jiggered. Michael filled with oil and said we'd leave overnight. However just 10 minutes later the level had dropped and you could see in the ports that both were leaking. w
kers. Not entirely sure if they're bent or they've not been lapped in (properly if at all) but either way it explains the 25% drop in compression on that pot.So, €300 spent on replacement parts plus labour, this is going to be a biiiiiig job.
b
ds.Oh I'm not upset with Olly, as he said you just can't rely on people masquerading as experts. Plus this is a big boys game, we all know the rules.
Re a comment above: the HG was fine, albeit a little thick but doing its job perfectly. The real shame is I now need to replace £200 worth of perfectly fine gaskets just to get to the fking valves!
Re a comment above: the HG was fine, albeit a little thick but doing its job perfectly. The real shame is I now need to replace £200 worth of perfectly fine gaskets just to get to the f
king valves!Gassing Station | Readers' Cars | Top of Page | What's New | My Stuff