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Old 15-07-2017, 08:04   #1
tazzi
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Silly question maybe. Turbo, same boost, more power??

May seem like a silly question but was bugging me. Basically my ix gt is running 390hp 360tq at 1.65 bar boost. It's going in on Monday for forged rods, link g4, 1000cc injectors, etc.

Now am I right to believe that at that same boost level, will the mapper Get the car to higher figures??

Sorry if it's me being thick.
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Old 15-07-2017, 08:43   #2
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Even if he does it's not going to be a huge amount, Simon may add a bit more boost, TBH the turbo can only flow what it can flow. What turbo is it?
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Old 15-07-2017, 08:54   #3
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It's a hybrid evo 9 turbo with 20g wheel.
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Old 15-07-2017, 08:54   #4
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I mean is it only a boost increase that will result in more power?
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Old 15-07-2017, 08:57   #5
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Should be 430 ish if you push it. Depends how long you want it to last!!

Still need to watch boost levels on standard pistons. I'm not a fan of re using old pistons personally.
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Old 15-07-2017, 08:58   #6
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Simon may be able to adjust the link better than OE so he may be able to squeeze a bit more out at same boost. You'll be used to the difference before you get home though..
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Old 15-07-2017, 09:08   #7
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It'll be marginal as already said. youre already near the limit of what it can flow.

What's the thinking with having it forged? Normally it's done to utilise a better turbo.
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Old 15-07-2017, 09:17   #8
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In the future I will get a bigger turbo. For now I'm having rod job done so I know engine is running well within its means. I've seen many 20g wheeled turbos flow 450 and sometimes beyond. Just wondering how it is achieved. I mean when mapped it can't only be the boost that's turned up to gain power. Surely there must be other factors
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Old 15-07-2017, 09:26   #9
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Ah fair enough, makes sense then

Those flowing those kinds of figures will no doubt have cams and headwork to flow sufficient air to make the numbers I would have thought. I'll be honest, not well up on the 20g wheel so others are gonna have to chime in.
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Old 17-07-2017, 12:48   #10
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I don't have any head work on my 9 but I do have cams and same injectors, and quite a lot of after-market parts(), and on my 80 series with the 20g compressor wheel I'm currently at 470bhp/465ftlb at just under 1.8bar (I think, or might be 1.7 bar)...so they can pump out good power if you mate it with the right accessories...
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Old 17-07-2017, 13:47   #11
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I've been looking at your spec quite abit. And except for the cams I think the mods I've got are very smilar to yours. It was mapped to 390 by lee bell at 1.6. Since then I have added elbow, front pipe, link ecu also going on.
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Old 17-07-2017, 13:48   #12
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I was just wondering if it was only theamount of boost the dictates the power gains, or of the mapper does other things with timing etc to get more power.
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Old 17-07-2017, 14:17   #13
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Well my car was previously mapped to about the same boost level as I have now, but I was on the standard 80 series (so no 20g upgrade) and I only got to 420bhp/450ftlb and since then I added an ETS IC and JMF manifold I think...so I assume the upgraded wheel on a similar boost should give you more power going by what happened with me...??

Maybe just ask Lee what you might get if you're really unsure I suppose, however all I asked him for when he mapped mine was a high boost setting (1.7-1.8bar) and a low boost (~1.4bar) without any real expectations of what that might end me up with...I wouldn't advise you go chasing numbers though...

By the way my low boost is 400 / 410...

I'm sure you'll be happy with how she goes after all the work you're having done to her though...
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Old 17-07-2017, 15:07   #14
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I'm
Sure I will be. Main reason for this thread was to see what actually is involved in gaining power during mapping. As it can't just revolve around boost. That's all.
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Old 17-07-2017, 16:11   #15
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Makes sense, absolutely...might as well try and find out what those extra pennies spent on ancillaries might be bringing to the table

So I reckon if you add in some kelford 272's and uprated springs to your spec I think that'll give you the best chance of getting to 450+...
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