Running Sweetly with Parallel Turbos

[MONKEYmark]

Originally posted by Nic

Alex, I have i256/e264 HKS cams fitted at the moment, the garage said much the same thing, that if I had 272's fitted the graph would continue to rise instead of dropping off over 5K.

i have hks cams n gears on mine i264 e264 and love them sound ok at idle too a little lumpy nothing to worry about.they sound good revs about 500-600 rpm and think they pull well.i got told 272 cams were for big turbos.and did not want to loose bottom end too much.i think midrange power is what i like.say from 30-100 it pulls well all up the rev range.

 

makes you smile all time. not into top speed runs myself. whats involved in going the TTC mode.and does having head done make much difference??

[Rich J]

Originally posted by MONKEYmark

wow that looks well smart for stock turbos,they are not hybrid stock turbos?

 

did you do a power run before the TTC conversion.would like to see what 1/4 times that will pull.i can see a flux of supra owners going for TTC mode.

 

but the TTC mode does not produce more power about 4000rpm, it just changes the characteristics of the power delivery below that point. Any gains seen here are from the stronger actuator, and tuning of the GReddy e-manage ECU fitted rather than the TTC.

[MONKEYmark]

Originally posted by HardHead42

but the TTC mode does not produce more power about 4000rpm, it just changes the characteristics of the power delivery below that point. Any gains seen here are from the stronger actuator, and tuning of the GReddy e-manage ECU fitted rather than the TTC.

it was more of the power and with it been TTC mode was just curious with it been 400+ bhp

 

do you wish you still had your supra?

[Rich J]

Originally posted by MONKEYmark

do you wish you still had your supra?

 

Not in this weather mate

 

I actualy do miss it sometimes, but the Integra is a very involving drive, it doesn't (in some cases) get there as fast, but the grin is at least as wide when you arrive. I have lots of plans for the Teg yet. If I had the space and the cash I'd have one of each.

[Guest Martin F]

Originally posted by HardHead42

but the TTC mode does not produce more power about 4000rpm, it just changes the characteristics of the power delivery below that point. Any gains seen here are from the stronger actuator, and tuning of the GReddy e-manage ECU fitted rather than the TTC.

 

I think HH is spot on. I think a lot of Nic's gains have been through the e-manage and the fuelling setup. I don't think that TTC gains you much more other than a smoother power delivery.

 

Saying that Nic's curve (Ohhh errrr missus) is quite nice and i'd certainly be proud of it.

[Alex]

Nic,

 

Did you have the head ported in your re-build???

 

If so I'm surprised you have got such a low rpm peak...

 

I would guess an upgrade to hybrids will be the next step.

 

When doing your TTC conversion have you fitted independant cone filters? 1 per turbo...if not maybe that could help.

 

Maybe a full JUN valve train will be necessary to release all the power...costs about £1600 inc cams ex shipping 272deg cams with 10.8mm lift. The GReddy e-manage should be able to plug the hole lower down with a bit more advance in the timing.

 

Are you on 440's still?? 429hp is a lot for them to deal with...an AIC (which the Greddy unit has as an option) will be able to add enough fuel for your needs on stock ceramics...

[Nic]

I would agree with what has been said about the negligible power gains of the TTC setup. The power gains are probably more due to the fueling/ignition set up, but the garage did say that with the TTC set up it is easier to map the fuel/ignition to maximise the power so in a way the TTC could have a power advantage over the sequential set up, but I am no expert.

 

Alex, Chris posted some photos and a description of the head work he did, I'm not sure how to post the link, but type in 'Head rebuild pics' in search and you should find it.

 

Yes I'm still running with the 440cc injectors, I do have an uprated pump and fuel pulsation dampner bypass fitted, also the fuel pressure regulator has been set up to deliver a higher pressure of fuel. The mixture was set on the dyno with a wide band O2 sensor and was set slightly on the rich side for safety, so the fueling is more than adequate to cope with the 1.4bar they were testing it at. I'm getting the odd back fire on over run when dropping down a gear would this be an indication that the mixture is slightly on the rich side? BTW Alex what is an AIC?

 

I was looking into getting a set of hybrids from Leon as the next upgrade but this was when I was having the problems and knew the turbos would need to come out to fix the waste gate actuator. For the moment I'm more than happy with the power, but I'm sure after a while it will start to feel normal again and I'll need another fix;)

 

cheers

[randy]

Nic,

 

Fuel pressure was increased with the Greddy unit right? Also what does your garage say about the Greddy e-manage as far as ease of tuning? Thanks for the info..... All the best and enjoy driving!

[Alex]

Nic,

 

Do you lose boost or does it hold once it hits its peak...just trying to work out why it drops off so badly.... still the peak power is very impressive for j-spec turbo's. Bet you're pleased! Now you need to get it to a strip and see what it manages....

 

An AIC is an Additional Injector controller (and harness). 2 additional injectors are put in the elbow of the pipe just before the throttle body. This is NOT the best way of adding additional fueling, but it does work and the E-manage has an option for it.

 

Is your regulator standard or adjustable? Ie are you just using the uprated pump to try and force more fuel pressure or is the regulator controlling and setting it?