Engine build progress
- Thread starter TTM
- Start date
TTM
Well-known member
No Patrick, I can't adjust timing. Can you? The KnockView suggests I shouldn't advance timing with pump fuel as it blinks a fair bit until peak torque is reached (it blinks more or less the same way as with the stock IC). The only way I can get more advanced timing now is to switch to E85 as the timing on the E85 V-flex map is I believe a lot more advanced, which should help throttle response nicely.
Do you have E85 there? If so, yes this will help enormously. You may need to run supporting mods such as larger injectors and 3bar FPR, larger fuel pump....plus you will go through a tank of fuel quite quickly compared to normal pump fuel. One because you use about 25% more and 2 because you will mash the throttle a lot more as it's FUN! [
] The thing to do is setup some dash mounted switches like I have and you can go between pump and E85 without having to plug the laptop in. Plus big red switches look cool...hehehe. You can see them in that video I posted of my car. We can run 1.5 bar comfortably, but run less on the track. If you just have a road car then you could run 22psi easily and in reality a lot more. Of course other things start to falter. Head gaskets mainly.
TTM
Well-known member
Yes, one of the tank stations where I usually fill up has some. I had already planned to try E85 anyway, and it looks like this slightly unnerving loss of throttle response and presence of lag will prompt this earlier than expected. I just ordered some bottles of this, when I receive it, probably next week, I will make the switch.
TTM
Well-known member
I took off the badge panel this morning, fiddled with the hoses and adjusted the pipes, went for a drive and noticed with much satisfaction that throttle response was back and lag was - almost - back to the previous level - [] Now I would have thought that a vacuum/boost leak, even minor, would have had significant influence on the air/fuel ratio, which wasn't the case during the first test drive with the bigger intercooler? For what it's worth, the air/fuel ratio on full load until redline was 11.8 with the original intercooler, now is 12.1 with the bigger intercooler, with the same fuel map. Any thoughts on this?
] Now I would have thought that a vacuum/boost leak, even minor, would have had significant influence on the air/fuel ratio, which wasn't the case during the first test drive with the bigger intercooler? For what it's worth, the air/fuel ratio on full load until redline was 11.8 with the original intercooler, now is 12.1 with the bigger intercooler, with the same fuel map. Any thoughts on this?George Elliott
New member
Thom, you mentioned a bigger exhaust in your comment on the 25th, I am making a 3"DP next week and I am happy to lend it to you for testing. If you like it we can agree a deal where you keep it, if not send it back. I will use it on another car. George 944T
George Elliott
New member
Thom, Thats fine, I will send you an image of the part at the end of next week. The OE Hotside Exit is 60mmID, and the 3" D/P (76.2mmOD) is 73.2mm ID due to 1.5mm wall. The upper flange is exact OE with crush-ring groove and 4 stud holes. The lower flange is different due to the bigger bore, and I will send you a compatible flange for the 3" exhaust. This will have a ring seal in place of the old crush gasket. The support is per OE A picture speaks a 1000 works! George
George, I have my engine out for a rebuild atm. I am probably going to stick with the K26/6 turbocharger and I would like to replace the down pipe with a larger one, ive got a 1987 car with the quite restrictive downpipe. Will prob use the rest of the stock exhaust system for now. If you decide to make any more please let me know!
Thom (or anyone else who has one) I am moving house in 8 days to a one room nothing and having to pay to put the rest of my stuff in storage. I chucked an awful lot out but in the process I came across some shiny hard pipe extensions I had made for the SFR intercooler. They are the same shape as the ones SFR supply but better made (the SFR ones are the ones with the visible weld in the photo). Its only a pointless fancy thing but if you want some more shiny bits I'll cut you a very aggressive deal ..say £10 plus postage? Cost me £100 to get made. See below. p.s. do I get another golden star for suggesting a boost leak ..it's ALWAYS a boost leak.
So this is where you are all lurking! Probably not the best place for this, but as you're already talking about the turbo downpipe.....does anyone know how difficult it is to remove it? Is it inlet and turbo off? (I'm contemplating getting a 3" one made) Regards to one and all.
TTM
Well-known member
Quick update, and sorry for not putting to rest this everlasting thread! Some more observations on the SFR intercooler. After fine tuning the fueling, and for the very first time since the 3.0 engine has been running, the KnockView has remained 100% quiet under full load with this intercooler. With the original intercooler, the KnockView blinked occasionaly until peak torque was reached. The price to pay for this bigger intercooler is a significant increase in lag. It's still nowhere near as bad as with a 2.5 engine though, but I can feel the loss over the original intercooler. Throttle response isn't as good as before either, but it's not "that" bad. My conclusion so far is this intercooler may actually work in bringing fresher air into the engine, though I don't have any hard datas to back this up, but at the costs described above. Next step is to invest in a bigger exhaust, in the hope that removing some restriction exhaust-side will help getting back into a satisfying balance with the intake side. Perhaps I should actually have gone for a bigger exhaust before installing a bigger intercooler.
I did exactly the same thing and sheared 2oo3 bolts of the downpipe! Now rebuilding the engine.... Also can't decide what to do turbo wise. I wan't somthing that spools like the k26/6 but holds say 1.2 bar to the redline. From my discussions with various people it doesn't seem like this is easily achievable. Prob just going to stick the k26/6 back on and fit a decent wastegate in the hope I can pull 1 bar to the redline.
hmmm, the turbo I'm *thinking* of replacing has very little lag, spools much faster than my k26/8 did, and will hold just under 1.2 almost to the redline. It only has about 30,000 miles on it and is in perfect condition - zero backlash, wear or damage........it's just that I'd now like more than 1.2![
] If I do decide to replace it I'll put it up on here somewhere...........
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