bhp predictions ????

[shaunwil]

The bad news is that my engine is goosed. Pips been tuning today and the best we got was 63.8bhp at the hubs, which is really bad. Plus pip said my diff is knackered ! He got the compression tester out and the car is showing 6.4-6.6 on the front rotor and 4.4-4.6 on the rear rotor.

Not good news ! To be expected from an engine thats done 110k miles !

The next big question is how soon can i get my hands on a 13b :Giggle in the form of a 2nd gen EGI ! It will get rebuilt and ported too before fitted into the car.

Oh and a new diff because pip said thats knackered too !

Shaun

[MikeLMR]

damn it I was nearest ... pity about the engine BUT does it drive better now it\'s been sorted that\'s the main thing of tuning ... not the number

now can you run a bridgey on LPG (that\'ll get those fuel cost back up again!)

[MikeLMR]

do you run different heat range plugs with gas ? does it burn clean or is there excess carbon if it is overfueled as per petrol ?

[kev-yorks]

Bad news Shaun but i\'m sure you\'ll get it sorted before long. As Mike said do you not fancy a 12a or 13b bridge?
Kevin

[travellinbob]

Bugger soory to hear that your engine is knackered. I was turning my 12a over the other day and noticed that it was feeling a little \'looser\' than mormal. Might also be looking for a 13b soon enough.
 top project, good luck with the lpg.

[shaunwil]

It was run on the same plugs. Pip thought the gas carb was restricting the flow so we did another run minus filter (because there is a bigger filter for the carb which is rated at 450cfm) but it didn\'t help.

Engine could have another 10k life in it, but at least i know that i need to get an engine ready for it !

When the new engine goes in it will be a 13b out of a 2nd gen EGI. Not sure on the porting yet, at least a medium street port thats for sure ! Should be able to use quite a bit of kit off the 12a to make the 13b a easier fit. Its not going to be a 12a because they seem to sustain higher damage and aren\'t usually rebuildable. Plus I\'ll still run it on carbs and minimise the setup as possible.

Kev, the rear axle isn\'t the right one. I need one with vented discs. The PCD changed between yours at 110x4 to mine 114.3x4 and lots of other stuff too !

Mike you where the closest. To be honest it doesn\'t feel greatly different from the petrol setup so the engine hasn\'t changed much. Plus pip got the engine to idle properly, which for a daily driver is worth the session alone.

I have to say the gas is a very good mod, done 85miles in the 1st gen and stopped on the way to pips to fill up at a motorway services. Stuck about 20l in the tank and still had change from a £10 note

Shaun

[kev-yorks]

I\'ll check the one thats on the rolling shell Shaun and get back to you if thats the same might be a few days though as works mental.
Kevin

[shaunwil]

Cheers kev

Shaun

[grinder]

as i said on the phone - i have a spare non running 13b in the garage - so we can strip that for any parts you need

i see a good project on the horizon

[antnicuk]

sorry to hear the engine is tired.  Sounds like an opportunity to me!

Mike,   Gas is much cleaner burning than petrol, its also somthing like 20 times cleaner than a diesel aswell.

You need a good ignition system with the gas as its so cold, but even gen 1\'s had a superior ignition system compared to most cars.  I have to change my plugs every 12k miles on the BMW, i reckong they would last longer withough the gas.

[shaunwil]

Oh yes, a good project.

Its the intake side that is bugging me at the moment. I\'d like to scrap the nikki as well, but that may mean an efi ida throttle boddy minus the petrol injectors (plumb oil metering into them) and some interesting adapters !

Shaun

[shaunwil]

Although the nikki may be the beginning of the process !!!!

Shaun

[travellinbob]

Hows about a decent sized holley? something with a larger cfm?

[shaunwil]

Im not after the petrol side of the system at all because of the gas and looking at the holley the impco carb is too tall to sit on top !

Plus the efi throttle body without the fuel rail is about £300 for a twin 50mm !

Shaun

[MikeLMR]

if you just want a throttle why not build plenum to sit on an IDA lower manifold or even the stock 13b lower manifold and use a big single throttle body

Cut out a manifold plate from stainless or alli plate, 2 or 4 runners into a suitably sized plenum (3" or 4" tube? there are calcs to work out ideal volume) then fit another flange onto that for a standard single throttle body off somthing else (scrappy job or Ebay or even an FD one?)

or make and adapter plate and use the whole FD manifold or a TII one