5 GT Turbo EFI - GT Turbo

[Mark Davis]

Lol just spunked a further £150 on MLS gasket, clutch release bearing and head bolts and then a further £400 on ductile liners. Just tracking down some rods and pistons.

Going to remove head and manifolds as one so I don’t have to fork out on yet another £90 on exhaust/inlet gasket.

Engine will be out by weekend and delivered to Mark G.

 

[andybond]

Lol just spunked a further £150 on MLS gasket, clutch release bearing and head bolts and then a further £400 on ductile liners. Just tracking down some rods and pistons.

Going to remove head and manifolds as one so I don’t have to fork out on yet another £90 on exhaust/inlet gasket.

Engine will be out by weekend and delivered to Mark G.

Lets get more pressing matters dealt with. Did you skimlink the clutch release bearing ?

 

[Mark Davis]

Lets get more pressing matters dealt with. Did you skimlink the clutch release bearing ?

Ahh!! Kill me now !! No I didn’t.

I bought liners from eBay too!

I’m a c**t, sorry.

 

[Mark Davis]

Well I’m not one to mess about so spent the morning stripping the 5 down. I’ve a mate coming over Thursday to pull the engine out and then I’ll shoot over to Marks on the weekend to drop bits off.

Pistons and rods will be here by Friday and liners arrived today. With any luck I’ll have it back in within a few weeks depending on Marks workload.

Going to order head stud conversion kit from Prima also. Also asked Jermaine to look into .86 housing, not decided on that yet though.

 

[Adey]

no messing about fair play! thats some dedication there

 

[Mark Davis]

Engine is out, off to Marks Saturday morning.

 

[Mark Davis]

So fuck it, let’s see what a 0.86 turbine housing does for performance.

 

[andybond]

Thats a shiny new housing Mister

 

[Mark Davis]

Thats a shiny new housing Mister

I'm thinking we go past 300 and see if we can get near Glenn's. It's good to have goals.

 

[andybond]

Aim for the sky , you could hit the ceiling !

 

[Adey]

is it bigger than what you have? seems huge but if it can rev itll be cool

 

[Mark Davis]

is it bigger than what you have? seems huge but if it can rev itll be cool

Current one is 0.64, so yeah quite a bit bigger. That age old trade off, spool vs power.

But with GTX Gen 2 with 0.64 housing we were positive boost by 3k, 20 psi by 4k and full boost by 4800rpm. I'm willing to give up 250-500rpm of lag/spool for say a 20-30% increase in power/efficiency but yeah its definitely a trade off. But plan is to take 0.64 with me on the day of mapping, worse case I swap them back once it cools.

Looking at Glenn's results below which is a much bigger turbo than mine (a GT30 variant I believe) even he was making full boost between 5500-6000 but revving out to 8k. I believe they finished on 41psi.

 

[Adey]

thats a shit load of boost. could you retime the cam a touch to shift things north for more revs?

 

[Mark Davis]

Look at the flow difference in housings quoted by Garrett.

 

[Mark Davis]

thats a shit load of boost. could you retime the cam a touch to shift things north for more revs?

Will talk to Mark, we were already at 114 degrees from Pipers quoted 110.

 

[Adey]

i have no idea on the score with cams but if it can shift the power band upwards where the turbo will be working it might be worth it.

 

[Mark Davis]

Got to the bottom of issue, number 4 rod bent.

 

[Mark Davis]

 

[Adey]

fair play, that could of been alot worst if it went full banana out of the block. But confirms suspicions

 

[Mark Davis]

So we can say that around 250hp/230ft lbs and 30+ psi that rods aren’t too happy.