LS2 Uprated Inlet Manifold?!?
Discussion
Is there anything on the market for an LS2 engine in a Monaro VXR that claims to be an uprated inlet/intake manifold? I know that you can uprate the throttle body to a larger one.
I have come across a couple of articles on the LSX 92mm FAST inlet/intake manifold, but that is about it - claiming a gain of 20rwhp.
Has anyone used a 92mm FAST on an LS2 in a Monaro VXR? Recommended modification? Any other brands of manifold out there and worth it?
Chose to base my next project down the tuned N/A route - already has uprated camshaft, camshaft springs, LT headers, sports CATS, exhaust system and intake kit in place.
I have come across a couple of articles on the LSX 92mm FAST inlet/intake manifold, but that is about it - claiming a gain of 20rwhp.
Has anyone used a 92mm FAST on an LS2 in a Monaro VXR? Recommended modification? Any other brands of manifold out there and worth it?
Chose to base my next project down the tuned N/A route - already has uprated camshaft, camshaft springs, LT headers, sports CATS, exhaust system and intake kit in place.
Edited by Tiger_kpt on Monday 8th March 12:57
gsd2000 said:
Mym8v8 runs a fast intake on an ls2, im not sure on the 20rwhp gains they seem a bit high to me. You can also port fast intakes.
Ahhh, that's all good to know, so FAST is an option. Not sure of any others? I'm thinking of adding intake, maybe uprated throttle body and going MAF-less tuned - as well as Pedders coilovers and LS7 clutch kit in the long term.
Not sure there is much point uprating the heads on an LS2 engine on a mild tuned N/A route...
Edited by Tiger_kpt on Monday 8th March 13:05
depends on your budget.
For n/a there absolutely is point in uprated heads. The heads are the biggest restriction in any part of the intake system.
But obviously these cost money due to fitting costs.
So if n/a is your ultimate goal, then IMO do heads first, and perhaps cam.
Then at a later date when funds allow, make the most of those mods with intake/exhaust mods.
or if you never intend to go that far, just do intake etc and be happy at that
For n/a there absolutely is point in uprated heads. The heads are the biggest restriction in any part of the intake system.
But obviously these cost money due to fitting costs.
So if n/a is your ultimate goal, then IMO do heads first, and perhaps cam.
Then at a later date when funds allow, make the most of those mods with intake/exhaust mods.
or if you never intend to go that far, just do intake etc and be happy at that
stevieturbo said:
depends on your budget.
For n/a there absolutely is point in uprated heads. The heads are the biggest restriction in any part of the intake system.
Except the cam of course For n/a there absolutely is point in uprated heads. The heads are the biggest restriction in any part of the intake system.
Closed valves dont flow very well.But yes. Heads, cam and intake is a good combo. FAST is the best composite type around and well proven with good gains.
If you are stock now. Cam and intake would be first on my list, then heads. The LS2 heads are much better than the LS1 heads.
Up to 50% over stock is possible with a hardcore NA setup on stock displacement. But you would have to do it right and it wont be cheap.
But it will go and sound excellent
Hi stevieturbo / ringram...
The engine in my VXR is an LS2.
Camshaft and matching springs have already been uprated.
Monkfish Magic Camshaft Pac - so no worries there about emissions!
Intake is Wortec CAI.
Exhaust is Wortec LT headers, sports CATS and CAT-back.
The heads are stock LS2 - which I thought flowed quite well out of the box, so may not be worth upgrading, especially as the uprated camshaft is a mild one in the scheme of things?
I'm definitely thinking LSX 92mm FAST intake, FAST throttle body. Followed by MAF-less tune.
I've done the FI route on my last SC'd Monaro VXR. N/A route this time - nothing too wild!
The engine in my VXR is an LS2.
Camshaft and matching springs have already been uprated.
Monkfish Magic Camshaft Pac - so no worries there about emissions!
Intake is Wortec CAI.
Exhaust is Wortec LT headers, sports CATS and CAT-back.
The heads are stock LS2 - which I thought flowed quite well out of the box, so may not be worth upgrading, especially as the uprated camshaft is a mild one in the scheme of things?
I'm definitely thinking LSX 92mm FAST intake, FAST throttle body. Followed by MAF-less tune.
I've done the FI route on my last SC'd Monaro VXR. N/A route this time - nothing too wild!
Edited by Tiger_kpt on Monday 8th March 18:41
Tiger_kpt said:
Hi stevieturbo / ringram...
The engine in my VXR is an LS2.
Camshaft and matching springs have already been uprated.
Monkfish Magic Camshaft Pac - so no worries there about emissions!
Intake is Wortec CAI.
Exhaust is Wortec LT headers, sports CATS and CAT-back.
The heads are stock LS2 - which I thought flowed quite well out of the box, so may not be worth upgrading, especially as the uprated camshaft is a mild one in the scheme of things?
I'm definitely thinking LSX 92mm FAST intake, FAST throttle body. Followed by MAF-less tune.
I've done the FI route on my last SC'd Monaro VXR. N/A route this time - nothing too wild!
The FAST only gives results at the top end of the rev range AFAIK. But you can very easily blend and port match as it comes in seperate sections. They are expensive though.The engine in my VXR is an LS2.
Camshaft and matching springs have already been uprated.
Monkfish Magic Camshaft Pac - so no worries there about emissions!
Intake is Wortec CAI.
Exhaust is Wortec LT headers, sports CATS and CAT-back.
The heads are stock LS2 - which I thought flowed quite well out of the box, so may not be worth upgrading, especially as the uprated camshaft is a mild one in the scheme of things?
I'm definitely thinking LSX 92mm FAST intake, FAST throttle body. Followed by MAF-less tune.
I've done the FI route on my last SC'd Monaro VXR. N/A route this time - nothing too wild!
Edited by Tiger_kpt on Monday 8th March 18:41
LS2 heads flow around 260cfm IIRC. A good set of aftermarket cnc ones will flow 320cfm.
I think the MF cam in lS2 does around 367rwhp with a decent intake (the ls2 intake is worse than Stigs jokes) and heads you will be over 400rwhp easy. But heads are £2000-ish and a Fast is around £700.
Plus fitting etc, though I fitted my own Fast intake no problems. The heads are pretty easy as well TBH.
Usual story, whats your goal? Or are you just seeking to optimise what you have? In which case check out TFS or AFR heads. Probably the 215 or 205cc ones for street performance. Go the Fast92 and just use your own 90mm throttle, ported if you like, but otherwise its fine for the power levels you have and wont be the bottleneck.
I think the MF cam in lS2 does around 367rwhp with a decent intake (the ls2 intake is worse than Stigs jokes) and heads you will be over 400rwhp easy. But heads are £2000-ish and a Fast is around £700.
Plus fitting etc, though I fitted my own Fast intake no problems. The heads are pretty easy as well TBH.
Usual story, whats your goal? Or are you just seeking to optimise what you have? In which case check out TFS or AFR heads. Probably the 215 or 205cc ones for street performance. Go the Fast92 and just use your own 90mm throttle, ported if you like, but otherwise its fine for the power levels you have and wont be the bottleneck.
Thanks for the feedback guys.
TBH I am only looking at optimising what I already have on the build. I definitely don't intend on going down the FI route or the forged bottom end route. Not looking at spending £1000's and £1000's - although I could convince myself to go as far as uprating the heads if I thought the gains would be decent. I am also quite happy with the specification of the MF cam - so wouldn't be looking at changing that either. Not sure if there is more potential available with the MF cam that is being restrained by the OEM heads, intake manifold or throttle body. Uprated under-drive pullies may also be a good step forward?
The car came with a recent dyno print out from the SSR dyno - can't remember what the rwhp figure was, but the fwhp figure was circa 475bhp - which I think is quite realistic.
I'm thinking that a MAF-less tune will definitely help things move along, not 100% though.
TBH I am only looking at optimising what I already have on the build. I definitely don't intend on going down the FI route or the forged bottom end route. Not looking at spending £1000's and £1000's - although I could convince myself to go as far as uprating the heads if I thought the gains would be decent. I am also quite happy with the specification of the MF cam - so wouldn't be looking at changing that either. Not sure if there is more potential available with the MF cam that is being restrained by the OEM heads, intake manifold or throttle body. Uprated under-drive pullies may also be a good step forward?
The car came with a recent dyno print out from the SSR dyno - can't remember what the rwhp figure was, but the fwhp figure was circa 475bhp - which I think is quite realistic.
I'm thinking that a MAF-less tune will definitely help things move along, not 100% though.
gsd2000 said:
Theres a midlands dyno day in april, why not come down? I will have efi live by then so im sure we could data log the run and get some more info
Hi mate. I wasn't aware of this. If it is still on, you can put my name down for this. If you have EFi Live by then, that would be a huge bonus.
P15TON said:
I have backed to back the LS2 intake against the Fast on the Dyno & I can tell you your money is much better spent elsewhere.
Hi... thanks for your feedback. Did it make any difference at all? What were your other supporting modifications? Was the tune altered to suit each time?
Edited by Tiger_kpt on Wednesday 10th March 09:41
P15TON said:
I have backed to back the LS2 intake against the Fast on the Dyno & I can tell you your money is much better spent elsewhere.
Yeah more details please mate. Stock heads? Ported Fast? Stable AFR before/after etc!?I can say with 100% certainty on the LS1 with aftermarket heads and cam it added significant airflow as logged with the scan tool.
Your results dont tally with any of the other back to back results Ive seen.
Maybe on stock engine back to back you are probably right though.
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