What turbo to use t3 fitment 350bhp?

[srankin90]

good lad you wont regret it!

yeah hopefully not! get it home tonight and start stripping it.

 

[pc18]

is there any 5es built engines running good times in england or ireland on the dragstrip ?seems 4e engines are doing the better times or is it down to tunning?

i didnt go 5e so that i could get quicker 1/4's i did it for the better drive and more mid range torque from the longer stroke.

but theres that ep71 s with a 5e thats done a 10.1 i think.

yeah hopefully not! get it home tonight and start stripping it.

piece of piss taking the 5e out the paseo with no turbo and stuff on, quicker than a starlet engine.

 

[animal gt]

is there any 5es built engines running good times in england or ireland on the dragstrip ?seems 4e engines are doing the better times or is it down to tunning?

seems uk is flooded with 5e's but they all either blow them up or end up breaking.says somting allright lol

 

[srankin90]

maybe just could be a coincidence that it was 5E's or bad tuning because there does really seem to be any real difference in the 4E and 5E apart from the stroke. just out of interest in what way do they usually go? bearings, pistons, rods?

 

[buckets]

seems uk is flooded with 5e's but they all either blow them up or end up breaking.says somting allright lol

true seems the 4e engines are holding there owen just ive seen alot of people building 5e engines seems pointless when they already have a 4e in there car to build up already is there any truth in the 5e giving more torque than 4es ?

 

[AdamB]

Might be due to incorrect compression ratio's, stock 5e is much higher, and even swapping pistons it will only go to like 8.5:1, still high if your planning on running more than 1.4 bar boost.

 

[srankin90]

true seems the 4e engines are holding there owen just ive seen alot of people building 5e engines seems pointless when they already have a 4e in there car to build up already is there any truth in the 5e giving more torque than 4es ?

only reason im doing it is for better driveability on the road and the fact that im getting an engine for cheap. As for torque theres someone on here getting 50lb/ft more with 5E with exact same spec and mapped by the same tuner

 

[srankin90]

Might be due to incorrect compression ratio's, stock 5e is much higher, and even swapping pistons it will only go to like 8.5:1, still high if your planning on running more than 1.4 bar boost.

probably the detonation killing them. I have lower comp dished pistons and 1.4mm headgasket. with a thicker headgasket would it be possible to get the compression down to 7.5:1?

 

[AdamB]

Yeah with the ratio so high the timing will have to be knocked off a lot. Not sure what the ratio would be mate, you will have to calculate it as it will depend on the cc's in the combustion chamber of the head. If you've had head work then you will get more cc's in there so you will get an even lower ratio.
Is that the ratio you are after 7.5:1? I would calculate your cc's in the head, take into account the cc's in the piston and experiment with different gasket sizes till you get the ratio you are after mate.

 

[Murray]

Might be due to incorrect compression ratio's, stock 5e is much higher, and even swapping pistons it will only go to like 8.5:1, still high if your planning on running more than 1.4 bar boost.

Sorry but i find that complete bollocks.Your all wanting drivability so lets knock down the compression into the 7s............ok

 

[AdamB]

True, but the engine won't last running any sort of high boost on a compression ratio of 9.8:1
Thats fine on a competition engine thats going to be rebuilt every 4 race meetings or you have a super budget.

 

[pc18]

i just got a 1.2mm gasket in mine. didn't want to go too low on the compression.

have a ratch through the forums and find some graphs from 5e's see how there getting on.


this is mine, bear in mind this is UNMAPPED and only running LOW boost!
the dip in the graph is where iv put too much fuel in the map.

 

[mickyboy]

Torque isnt bad like 243.5 ft-lb just befor 4500rpm runnig low boost aswell

 

[AdamB]

Looks like a half decent base to start with PC18, what boost is that running? Is that 11.5psi? What's your compression ratio like with the 1.2mm gasket?

 

[pc18]

Looks like a half decent base to start with PC18, what boost is that running? Is that 11.5psi? What's your compression ratio like with the 1.2mm gasket?

boost is the green line 1.1 bar. tbh it was that long ago when i spec'ed my engine on the phone with Dave B i cant remember the exact cr but im pretty sure its not much lower than stock. i didnt want a lag monster as i wasnt planning on running high boost.
if i wanted to lower it at some point in the future all i need to do is wip the head off and go for a thicker head gasket, the arp's can be re used. so no trouble really.

 

[Rory]

Its not just the C/R that determines how long an engine will last
9.8/1 would be fine, just look at the Honda boys running big turbos on stock motors........ Higher C/R to start with!
Competition motors would be no where near that low on C/R, they would be alot higher.

True, but the engine won't last running any sort of high boost on a compression ratio of 9.8:1
Thats fine on a competition engine thats going to be rebuilt every 4 race meetings or you have a super budget.

 

[AdamB]

Yeah I understand it's not just the c/r that means how long an engine is going to last, but as you put it, the honda boys start with high compression, but what do they do when they want to raise the boost? Just shove a thicker gasket in there lol.
Turbo competition motors will probably be around 9.5:1 upwards, but they are not too worried about having a reliable motor, aslong as its reliable enough to get them to the end, or to cover a certain amount of races thats all they are worried about. Typically a race engine will be rebuilt every 4000 miles, not very practical for a road car :haha:
Be interesting to know what c/r the F1 teams will run in 2013 on their 1.6 turbo motors

 

[Rory]

Honda boys use stock gaskets... Nothing else is recomended.
9.5/1 is just fine in my opinion, remember your car wont be high revving all the time so you cant compare a road engine to a race motor....
Reliability in racing the upmost number one thing, rebuilding motors isnt cheap!!