performance camshaft

Toreto · Post by **Toreto** » Tue May 30, 2006 7:35 pm

I need a performance camshaft kit for the B18FT engine but I have trouble finding one,so I would appreciate it if somebody can tell if there are any avaliable and where?
Thanks!

robin_xr4i · Post by **robin_xr4i** » Wed May 31, 2006 11:55 am

According to some folk (mainly the R5 crowd) a camshaft from a N/A 1.7 ES works well?

However I would question the worth of this as N/A cams usually dont work well in turbo car, due to overlap and duration differences! Still do a search on the subject, it was disscussed a few months back.

Toreto · Post by **Toreto** » Wed May 31, 2006 5:31 pm

robin_xr4i wrote:According to some folk (mainly the R5 crowd) a camshaft from a N/A 1.7 ES works well?

However I would question the worth of this as N/A cams usually dont work well in turbo car, due to overlap and duration differences! Still do a search on the subject, it was disscussed a few months back.

Aren't there any especially for the B18FT?

terrastudios · Post by **terrastudios** » Wed May 31, 2006 7:50 pm

Not anything off the shelf - its usually a custom regrind job - sorry to deliver the bad news.

Toreto · Post by **Toreto** » Wed May 31, 2006 8:31 pm

terrastudios wrote:Not anything off the shelf - its usually a custom regrind job - sorry to deliver the bad news.

Too bad really! Thanks anyway!

V480TI · Post by **V480TI** » Wed May 31, 2006 8:58 pm

Yes there is.
A company called Dbilas or so.
They have a webpage for their company.
www.dbilas.com

greetz

Toreto · Post by **Toreto** » Thu Jun 01, 2006 6:47 pm

V480TI wrote:Yes there is.
A company called Dbilas or so.
They have a webpage for their company.
www.dbilas.com

greetz

Thanks! I mailed them and waiting for reply!

POE · Post by **POE** » Thu Jun 01, 2006 7:53 pm

hi, have reada lot about mods like this over the years and say doing headwork is quite pointless and wont gain anything from this and also might reduce bhp on its own ,but they might be wrong .,.,goodluck

Toreto · Post by **Toreto** » Thu Jun 01, 2006 8:07 pm

POE wrote:hi, have reada lot about mods like this over the years and say doing headwork is quite pointless and wont gain anything from this and also might reduce bhp on its own ,but they might be wrong .,.,goodluck

That's exactly why I'm searching for a camshaft especially engineered for the B18FT. I won't use anything else.

V480TI · Post by **V480TI** » Thu Jun 01, 2006 9:08 pm

Keep in mind, if decide to use a camshaft everything else has to altered, think of injection,management, in and outlets, parts involving camshaft,maybe other valves and valvesprings.
Also check clearances of valves to head.

goodluck

greetz

Toreto · Post by **Toreto** » Thu Jun 01, 2006 9:17 pm

V480TI wrote:Keep in mind, if decide to use a camshaft everything else has to altered, think of injection,management, in and outlets, parts involving camshaft,maybe other valves and valvesprings.
Also check clearances of valves to head.

goodluck

greetz

I will! Thanks!

haz@nocturnal_development · Post by **haz@nocturnal_development** » Fri Jun 02, 2006 9:43 am

there's 3 types of cam in the 1.7, each slightly different. i use a large blower so the cam i've used works well. i've not changed anything to suit the cam, just fitted it. ecu's are still the same as well as timin, valve springs, afm etc etc.

you could prob get 1 of each cam from a local scrappy n take half hour to fit and then test each 1. if they are no good then contact piper who will custom grind 1 for Â£180

there isn't much on the shelf parts for these engines so you have to try a few things before you get it right, but thats part of the fun.

haz

JohnTurbo · Post by **JohnTurbo** » Fri Jun 02, 2006 4:14 pm

you could prob get 1 of each cam from a local scrappy n take half hour to fit and then test each 1. if they are no good then contact piper who will custom grind 1 for Â£180 Shocked

EEP! Was only Â£110 a few years ago.

Murf · Post by **Murf** » Fri Jun 02, 2006 4:39 pm

Â£180 for a custom ground cam is not bad! think of trying to grind one yourself!!

sjoerdb · Post by **sjoerdb** » Fri Jun 02, 2006 10:05 pm

and a camshaft of a other engine, like a carburator engine. maybe the duration is better.....

i'm now little bit busy with trying a other camshaft for a B18FP engine.

Jamo · Post by **Jamo** » Mon Jun 05, 2006 2:46 pm

BTDT fitted it, not worth it on the 480 T IMO

Toreto · Post by **Toreto** » Thu Jun 08, 2006 5:28 pm

Yo! I just got the e-mail from dbilas.com. They can regrind my camshaft

So I'll be running a B18FT performance camshaft afterall

rpruen · Post by **rpruen** » Sat Jun 10, 2006 5:28 pm

For the B18FT camshafts should be no problem, since the airflow is metered, you can make resonably big changes without having to change anything much.

Also because of the turbo / intercooler you don't have the same problem as NA cars with reverse flow (and pressure pulses). The extra intake plumbing evens that out.

Some points to bear in mind though...

A lot of overlap will lower the VE and compression ratio at low RPM. That may make for a lumpy idle, and trouble passing an MOT.

The killer problem with a wild cam is that the exhaust manifold pressure. With the standard T2 this will show up with even a resonably mild replacement cam. Exhaust gas can flow back into the cylinder and will cause problems, possibly pre-ignition (this isn't the same as detonation, google for it) and could melt the engine in a few secconds. A turbo with a freer exhaust turbine will help a lot here, but with lots of turbo lag.

If you plan to change the turbo, then an ES cam will be a fairly good bet. However to get away with it you need to be looking at a Saab Aero, or 940 Turbo Diesel T3, or something of that sort. They are resonably easy to fit to the standard manifold and downpipe, so that's a plus.

A custom cam re-grind will still be likely to beat an ES cam, as long as the people doing it can adapt it to suit your application.

Hope that's some help to everyone.

Richard

haz@nocturnal_development · Post by **haz@nocturnal_development** » Mon Jun 12, 2006 10:29 am

i was under the impression that diesel turbo's wouldn't work properly due to the heat of a pertol motor, thus making the blades crack and fall off.

i also thought that the manifolds are of t2 and t25 fitment, the t3 flange is different, or is that not the case with the diesel blower??

how can you get the std cam reground, there isn't much there in the 1st place, the es cam i'm using has alot more meat on it than the very pointy turbo cam??

personally the tiny t2 is too small, hance why the car drives like an n/a, i think it needs at least a t25 to make it feel turbo'd.

haz:)

robin_xr4i · Post by **robin_xr4i** » Mon Jun 12, 2006 11:48 am

haz@nocturnal_development wrote:i was under the impression that diesel turbo's wouldn't work properly due to the heat of a pertol motor, thus making the blades crack and fall off.

Thats what i was told! but i have seen petrol turbo conversion which use diesel blowers without hassle, most recently a Hillman Imp using the original lump and a VW golf tdi turbo (which was in retro cars a few months ago).

haz@nocturnal_development wrote:i also thought that the manifolds are of t2 and t25 fitment, the t3 flange is different, or is that not the case with the diesel blower??

Surely you can machine the original manifold from the round T2 to the square T3+ style flange?

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