AdamB

You need a piece of perspex plastic with a hole drilled in at one side. Then smear a bit of grease around the combustion chamber and place the perspex on top. Use a burette and fill through the drilled hole with water and take note of how much fluid is lost from the burette, this will be the volume. You can do the same for the block when the piston is at TDC. 1ml = 1cc. Never go by what it says on the box, your right 8.5 isnt 8.5 and 6.5 isnt 6.5 either. Its only that CR as to whoever designed them and what setup was used to determine that ratio. Problem is getting a thicker heacgasket is es

You would spend that sorta money trying to get them to fit as well lol.

This is it. It all depends on how much boost you run as well, because if you run high boost with tight oil clearences you'll chew threw the shells in no time as there will be less hydroplaning during the power stroke.

Assuming its a 4E with 74.5mm bore, 1.2mm headgasket and a stock combustion chamber volume, but you'll have to measure it to be sure and also measure any volume in the bore when the piston is at TDC, although if flat top pistons they should sit level with the deck height. Your CR would be 9.6:1. Even with a 2mm headgasket it will only drop it to 9.4:1. If you want somewhere around the 8.5:1 mark you'll need a combustion chamber volume of 45cc. With a high compression engine, knock is more inevitable, so better control of the ignition and fueling is paramount. What turbo do you plan on runni

Flat tops I take it? Same as Toff's. Just because it says 9:1 on the box doesn't mesn it will be. You need to measure the combustion chamber volume and calculate the CR. I hope your planning on upgrading the management to something decent. You can either retard the ignition timing,retard the valve timing or do both. I would set the base ignition timing to something like 7 or 8 degrees BTDC.

Yeah they mainly do stuff for american motors, but do the odd stuff for euro and jap motors. Well I can get the King bearings for £61 +p&p, thats for a 5E and a whole set including mains, rods and thrusts.

I would retard it until its mapped. I would expect to use a good standalone ecu if running that high, wouldn't trust a piggyback. What pistons are they? Is it 4E? Has the CR actually been measured and calculated?

If you can justify it then a Garrett GT2560 would work really well! Spool like a td04 but make just a touch over 300bhp.

ACL have had their ups and downs like most companies, but they are readily available. Not too sure on the price of OEM Toyota but I don't think ACL breaks the bank, I would rather replace bearings at £80 than be replacing a crank. King are big in the States, not seen much of them over here but I can get hold of sets for the E series but wondered if anyone had used them before.

Have heard of some problems with ACL before but not for a long time. Tbh it depends how much power your running, some drag engines can only do a couple of runs before the bearings need replacing. Besides the E series engines don't exactly have the widest of journals to spread the load either. While on the subject, anyone ever used King engine bearings?

That red KP has been for sale for some time, thats if its the same one.

The only thing needed to know to achieve your power goal is if the compressor will flow the correct volume of air, but like I say it depends on the compression ratio, fuel used, air temp, fuel temp etc. If you want to get really anal then saying a turbo will flow 320 CFM, depending on the friction factor of the intercooler piping used and the pressure drop of the core you'll see no where near that at the intake manifold and you'll have to work the turbo even harder to supply enough air. Am sure we all know how turbo's work by now, so if you can rotate the turbine wheel faster it will rotat

The normal Td04-13T I think it is? Will serve 99% of the people well, but it depends what the lads after really and his budget. Lets not go there on me being an "expert"

Explain mate, what happened?

Your the one who went through the calculations, so whats your point? My point is simple, compressor map means nothing unless you know what your looking for and even then they don't mean too much because theres too many variables it doesn't take into account, CR, air temp ect. Best and only way to plot on a map is to use a speed sensor. There are many varients of the td04 but a few have different flanges, guy over on TGGT has used quite a few of them all different sizes. They have been tried and tested, so its not much of a problem to choose.

Anytime mate

Thats correct but you need to know what your looking for when plotting, whether its for best spool, max efficiency etc. And like I say its only half the story, the compressor airflow is proportional to turbine size and velocity.

The symptoms would be knocking or excessive oil consumption if the oil clearences are out of tolerence. As you said the only real way to check is to have a look and check the crank and bearings for wear, see which layers have gone through. I would be checking for signs of overheating as well as this will indicate an oil supply issue which 9/10 times causes the bearings to knock.

I've heard a shed load of bad comments about Dell recently and their poor customer service/aftersales. Once they have your money they don't give a shit. Check out overclockers or Novatech.

Not that I know of mate. I would turn the fuel pressure down and not boost it, get it checked by a tuner asap. What fpr is it?

I've got these. Really comfy and absorb really well. They hug you really nice but I think if you weigh more than 10 stone you will probably feel quite uncomfortable. I think the best thing to do would be go try out a few sets and see what feels good for you.

ACL recommend their bearing shells are changed every 30,000 km as to keep the crank in good condition. Saying that though some engines still go strong on the originals above 100k miles. Whats your mileage? Generally they go due to an oil supply problem. Do you have an oil pressure gauge? Oil pick up ever been cleaned?

Whats the fuel pressure set at?

Compressor maps are all well and good but you need to find one for a td04, and besides the compressor wheel is only half the story.

Yeah thats Shelly