JapCarForum Car Manufacturers Lexus/Toyota IS200 / IS300 / SPORTCROSS / Altezza Supercharging & Turbo Modifications Totally stumped...........

Totally stumped...........

Totally stumped...........

Pages (4): 1 2 3 4 Next
micromarc
Member
203
15-07-2019, 06:50 PM
#1
As the title says guys.....

After having silverline making me a new pulley for the charger to try and fix the boost problems still not making anythingSad

Today I took it for a rr with fingers crossed hoping it was a dodgy gauge or something. Made a whole 137 at the fly!!!!!!

Only idea that the guy had went along the lines of this that I ve copied from a site, any input would be welcome guys

s with the Roots-type supercharger, you must install a bypass valve and relocate the throttle body ahead of the supercharger's inlet port when implementing a twin-screw supercharger. If you don't move the throttle body, the pressure between the supercharger and the throttle plate will build up on idle, or when decelerating or changing gear. When the pressure between the supercharger and the closed throttle exceeds the boost pressure produced by the supercharger, the air will be forced back through the supercharger. This will cause the supercharger to cease as air can only move in one direction through a positive-displacement supercharger. As a result, the drive belt could be destroyed and the throttle plate could buckle and get jammed in the throttle bore as the pressure will not be released. However, relocating the throttle body will result in poor throttle response but this is unavoidable.

Only thing about this is do the tte kits not run simillar to this?
micromarc
15-07-2019, 06:50 PM #1

As the title says guys.....

After having silverline making me a new pulley for the charger to try and fix the boost problems still not making anythingSad

Today I took it for a rr with fingers crossed hoping it was a dodgy gauge or something. Made a whole 137 at the fly!!!!!!

Only idea that the guy had went along the lines of this that I ve copied from a site, any input would be welcome guys

s with the Roots-type supercharger, you must install a bypass valve and relocate the throttle body ahead of the supercharger's inlet port when implementing a twin-screw supercharger. If you don't move the throttle body, the pressure between the supercharger and the throttle plate will build up on idle, or when decelerating or changing gear. When the pressure between the supercharger and the closed throttle exceeds the boost pressure produced by the supercharger, the air will be forced back through the supercharger. This will cause the supercharger to cease as air can only move in one direction through a positive-displacement supercharger. As a result, the drive belt could be destroyed and the throttle plate could buckle and get jammed in the throttle bore as the pressure will not be released. However, relocating the throttle body will result in poor throttle response but this is unavoidable.

Only thing about this is do the tte kits not run simillar to this?

jimxms
Posting Freak
2,473
15-07-2019, 06:52 PM
#2
Is it making all the same noises that it did when it was working previously?

First (obvious) thing that springs to mind would be belt slip. It may still spin the charger enough for it not to be noticeable, but at the same time also be slipping enough not to make any positive boost.
jimxms
15-07-2019, 06:52 PM #2

Is it making all the same noises that it did when it was working previously?

First (obvious) thing that springs to mind would be belt slip. It may still spin the charger enough for it not to be noticeable, but at the same time also be slipping enough not to make any positive boost.

micromarc
Member
203
15-07-2019, 06:55 PM
#3
It's still spinning the right way. Had belt slip before when the belt was a wee bit too big, the belt is spot on now.
micromarc
15-07-2019, 06:55 PM #3

It's still spinning the right way. Had belt slip before when the belt was a wee bit too big, the belt is spot on now.

Sparkystav
Administrator
14,683
15-07-2019, 07:03 PM
#4
Hmm. Is odd. I'd go with belt slip or a burst pipe.

Have you got a bypass? Or just a dump valve? Have you checked for leaks in the circuit.

One way is to use brake cleaner spray it on the pipes/joins one by one the engine will struggle for a second if it sucks any in.

Do you know what speed the charger is spinning at now? Have you checked its enough for boost with the manufacturer?

OutlawJapClub Admin Team
Sparkystav
15-07-2019, 07:03 PM #4

Hmm. Is odd. I'd go with belt slip or a burst pipe.

Have you got a bypass? Or just a dump valve? Have you checked for leaks in the circuit.

One way is to use brake cleaner spray it on the pipes/joins one by one the engine will struggle for a second if it sucks any in.

Do you know what speed the charger is spinning at now? Have you checked its enough for boost with the manufacturer?


OutlawJapClub Admin Team

micromarc
Member
203
15-07-2019, 07:13 PM
#5
Just a dump. Might give the brake cleaner a go. Willing to try anything.

What did you think of the paragraph I copied?
micromarc
15-07-2019, 07:13 PM #5

Just a dump. Might give the brake cleaner a go. Willing to try anything.

What did you think of the paragraph I copied?

Sparkystav
Administrator
14,683
15-07-2019, 07:26 PM
#6
It's just basically saying why you need a bypass. Like the tte kit.
Won't the reason you have no boost IMHO. Air should be coming out of the dump valve whilst your idling though if it's doing it's job as a bypass.

What type of dump you have? If it's a Bailey type it's no good. You need a hks ssqv IMHO.

OutlawJapClub Admin Team
Sparkystav
15-07-2019, 07:26 PM #6

It's just basically saying why you need a bypass. Like the tte kit.
Won't the reason you have no boost IMHO. Air should be coming out of the dump valve whilst your idling though if it's doing it's job as a bypass.

What type of dump you have? If it's a Bailey type it's no good. You need a hks ssqv IMHO.


OutlawJapClub Admin Team

micromarc
Member
203
15-07-2019, 07:34 PM
#7
It's a bailey but is doing the right job. Air is escaping when on idle and closing on throttle on.
micromarc
15-07-2019, 07:34 PM #7

It's a bailey but is doing the right job. Air is escaping when on idle and closing on throttle on.

Sparkystav
Administrator
14,683
15-07-2019, 07:38 PM
#8
Fair enough if it's working then. I'd check for leaks and check the rpm to know if it's making enough pressure at all.

You at jae with it? I have an rpm meter I can bring.

OutlawJapClub Admin Team
Sparkystav
15-07-2019, 07:38 PM #8

Fair enough if it's working then. I'd check for leaks and check the rpm to know if it's making enough pressure at all.

You at jae with it? I have an rpm meter I can bring.


OutlawJapClub Admin Team

micromarc
Member
203
15-07-2019, 07:44 PM
#9
Might try and get hold of ormi tomorrow, see if fitting his ssqv would work? I had one to fit originally but it would nt work.

I m still in 2 minds about jae, the lex needs a clutch now and that was gonna be jae moneySad
micromarc
15-07-2019, 07:44 PM #9

Might try and get hold of ormi tomorrow, see if fitting his ssqv would work? I had one to fit originally but it would nt work.

I m still in 2 minds about jae, the lex needs a clutch now and that was gonna be jae moneySad

Sparkystav
Administrator
14,683
15-07-2019, 07:45 PM
#10
Be good to see you mate.

Have you checked the makers instructions for the speed you need?

OutlawJapClub Admin Team
Sparkystav
15-07-2019, 07:45 PM #10

Be good to see you mate.

Have you checked the makers instructions for the speed you need?


OutlawJapClub Admin Team

Pages (4): 1 2 3 4 Next
Recently Browsing
 1 Guest(s)
Recently Browsing
 1 Guest(s)