Thanks Paul,

Head gaskets are 1.6mm items. I'm not quite following you on the headers comment? Lol. I have a set on GT specs going on this.
Especially on an unsleeved 257 case, I wanted this to be very det resistant. And only wanting to run V-Power if possible. I don't mind using meth but don't have access to E85 etc.

 

Surprisingly the chambers aren't as big as the photos make out. These are slightly smaller than the 55cc 2.5 heads.
These chambers are bang on 54cc.
Stock 2.5 STIs are 8.2:1 if I'm not mistaken?

 

That's if they even make that out of the factory, but I believe that is the stock stated spec.

Add at least a full "1" to that ratio to make you smile!

 

High comp turbo motors do work very well, but are very fuel sensitive and knock prone if not run on very high quality fuels.

 

Never had any apparant problems with DET on mine, whether I have ran the VPower map or my "normal" Super Unleaded map (where I have been caught short). ECU does have knock control which is effective.

Alot of the potential problems may be resultant to "pushing" the map too close to the edge, but as you say, unless you are running a controlled fuel that would be pointless. Whatever map my car ever ends up with, at any one time, it has to take all the punishment that I plan to throw at it.

You obviously need to be fairly sensible with higher comp on VPower or less, but that certainly does not mean you are any more knock prone if it is mapped correctly.

Saying all of this though, mine was changed to high-comp based on theory and I was willing to give it an educated punt. The results we have had were certainly not expected to the level that has been achieved.

 

Quick update on this.

Late change to spec includes a swap to Lateral long Crower H beam billet rods and Lateral custom wiseco pistons to suit.

The pistons are ever so slightly larger than the last set so the block has gone to be index honed to suit. I should get it back next week. The pistons/rods bearings have all been measured, checked and weighed. Now the complete rotating assembly only differs by 0.6grams.

 

I like the long rod idea, extra torque and quicker spool

Banny

 

nice

 

Block now index honed for clearance to suit the new Wiseco buckets. This needs another measure, inspection and wash before she goes together.

Some snaps of the new internals if youre interested.

Build should be underway next week.

 

internals and block look really good frayz, what displacement you going for?

 

2.5ltr mate

 

Just out of interest, why do you have all the weights/sizes on the components, does the block all have to match these?

Just interested as I'd love to build an engine myself, but wouldnt know where to start lol

Ricey

 

I weigh every internal rotating component. Then measure for clearance and match all components to one another to get the closest possible balance.
Rods, pistons, indevidual rings, circlips, bearings, bolts etc.
The diffence between the heaviest and lightest on this build is 0.6grams.

i find that acceptable, if not then i would shave to suit.

 

cool, cheers frayz

 

looking good frayz your doing a great job so far mate and getting somewhere now fella

 

Nice chat on the phone yesterday frayz,looking good,this is going to be some motor,keep up the good work.

 

Frayz, as per NASIOC, I am rollin now, and should be mapped next week sometime so I will try and give you as much info as poss.

Hold fire with the sale of the 3076 for now.

All I will be comparing though, is my previous 321V non avcs motor, to my 35 JDM AVCS motor.

Neil.

 

Dude, ive been trying to call you about this. Phone wont ring for some reason?

Whats the spec of the current motor? Ive just ordered valves to add some security/ peace of mind.
Ive a guy breaking my arm for my 30R, so the 35 looks imminent

 

Frayz...what are you going to use your car for?

 

90% fast road 10% track/nurburgring.
Yes i know that points to the 3076, however its not exactly my daily drive. Will be a weekend toy only.
In my mind, the 2.5ltr is 25% larger than a 2ltr. Yet a 35R is nowhere near 25% larger than a 30R. So it cant be any worse, if not as bad as the 30r most people will put on a 2ltr.
Should be plenty torquey enough off boost and then when the 35R hits, it should do so with quite a bigger thump than the 30R. I know the 30 should make more torque as it will come on sooner. However, i dont want to push crazy torque on the non linered block.

What are your thougts? Am i logical or mental?

 

Frayz

It sounds like you've already made your mind up and you're just trying to convince yourself it's the right decision, Google cognitive dissonance

Just sell the 30R and have done with it you know it makes sense

 

Haha, Daz, maybe youre right

 

or build it with the 30R and then swap if you think its still necessary after you've run it for a while, an almost new 30R will always shift quickly...less faffing around and probably get you back on the rad sooner

 

I've already tried that approach with him Trails LOL

 

The only thing that will get me on the road sooner is a sh1tload of cash. Turbo choice has sod all to do with it. Id rather sell a new gt30 than a used one too.

 

hi m8 just wondering did u buy rotated setup or make urself ,james,nice job

 

Someone else is making my setup. I dont have it yet.

 

Now where have I heard this before........

FWIW Frayz, my road car runs a VF34...............my race car a GT30R.

Forget a 35 unless all your concerned with is bragging rights, the 30R will be quicker in all but very few situations. The 35 commands a lot of respect (do not read this as quicker) to get the most from it on the road.

 

I just want to see it rolling...all too familiar with scope creep with y own project

 

35R + 2.5 rules..... I hope as mine will be mapped V soon with luck

Always find your better having some head room for when you get bored. Gotta be loads of us that have wasted money changing things in the pursuit of go...

Good luck with it and hope to see some figures soon

Cheers
Col