Top speed lost...

[Md Ekal]

I recently change my TB to Super90 70mm and intake manifold from standard to Velocity Venom Style Manifold...

And I experience a top speed lost, b4 dis I can go to 220km/h, right now after full throttle I just maintain 180km/h....

I drive Satria GTi with MMC ecu...

Hope all sifu and wiseguy here can help me....

Thx in advance....

 

[mona-vie]

Whats your engine? If its 1.8L and NA, 70mm TB is way too big.

 

[ehdrian]

Bro, did u retune the car?..

 

[Md Ekal]

Whats your engine? If its 1.8L and NA, 70mm TB is way too big.

Yes its 1.8 n NA, oh really ea??? but i plan to do more mod after this such as change camshaft to 288 in 288 ex....

Bro, did u retune the car?..

Already go to Proton services, they said there are 3 sensor error, and already reset it, but still the problem cant solved....

 

[^pomen_GTR^]

have the error checked and rectified before erased???

if only erase error code then problem still there..

try play with cam pulley adjustmen

 

[Md Ekal]

have the error checked and rectified before erased???

if only erase error code then problem still there..

try play with cam pulley adjustmen

I dont know, but they said they already reset it....
About cam pulley adjustment ...I will gve it try...
Thx bro....

 

[Jakk]

did u do anything with ur exhaust?

 

[Md Ekal]

did u do anything with ur exhaust?

standard manifold (4-2-1) and remove CAT, change to 2' pipe till exhaust.... 1 twister bullet in the middle... and APEXi imitation type of exhaust at the end...

 

[vr2turbo]

Fuel feed? anything done to ECU?

 

[K_Takuya]

standard manifold (4-2-1) and remove CAT, change to 2' pipe till exhaust.... 1 twister bullet in the middle... and APEXi imitation type of exhaust at the end...

I thought twister bullet is for auto ?

 

[DanzEterna]

last time i was using 2" exhaust pipes on my sgti but loose on top end...same as u 180kmh max
changed back to ori piping 1.65". running on mmc ecu also.

 

[vr2turbo]

last time i was using 2" exhaust pipes on my sgti but loose on top end...same as u 180kmh max
changed back to ori piping 1.65". running on mmc ecu also.

Hmmm... I thought for high end, larger exhaust better. Exhaust faster go out, then must have thought wrong....

 

[93na]

i think tunning bro.. good starting mod, try setting pulley, head mod?.. you definitely needs cams to get the best setting. but your pully now is nice right. piston?

 

[Md Ekal]

Thx for all reply...

I using standard piston, cam pulley on going plan to change....(end of nxt month)

---------- Post added at 10:25 PM ---------- 6 hour anti-bump limit - Previous post was at 10:24 PM ----------

Fuel feed? anything done to ECU?

Fuel regulator WORKS....and still using standard injector (240cc)

 

[^pomen_GTR^]

I thought twister bullet is for auto ?

not neccessarily...is the size of the bullet adequate then it also good for manual....


but i myself opt for straight type bullet (no twist inside) on my auto ride....with stock piping but the bullet in/out a bit bigger than that....slightly better than stock centerbox and without noisy drone at all.....(just slight roar on WOT compared to 100% stock exhaust)...respond slightly better (not much but better than stock)...still watching FC..but from early judge looks like fc getting better....my 1.6 sohc 4g92 (A) quite thirsty now.....huhuhuhu

 

[Md Ekal]

So I need to change back to standard piping ea???
Then I can get back my top speed? right???

 

[alen]

hi bro, u can't use bigger exhaust for NA engine, as it would make u loose some horsepower= topspeed.....

 

[mines998]

If everything ok reduce yr rims size may give you some top speed.

 

[vr2turbo]

May give you false reading...meaning smaller wheels under read, show higher speed.....

 

[Md Ekal]

Erm...
Let say if I install cam 288 in/ex complete (with cam pulley adjustable and lighten crank)
And what should I do next???
Will it stay at the same top speed???
Should I install emanage or safc????