- Joined
- Sep 20, 2013
- Messages
- 67
- Points
- 15
What up folks? As you know I'm Brazilian and it's a pleasure to exchange experience here with you.
I'm about to buy a Bravo T-JET (it's very similar to the Bravo Sport T-JET 150 sold in Europe) and of course it's OEM condition isn't gonna last long. So... today's point is medium to hard T-JET tuning.
Head
First of all I'd like to know a few things about the head. The only T-JET engine fitting our Bravos is the 150 hp variant, that DOHC W/O Multiair one. I'm wondering what's the best one to tune: DOHC no-Multiair or SOHC Multiair? In general DOHC heads are way better than SOHC ones by providing a wide range of cam phasing tuning. DOHC ones use to provide more air flow as well. Other point is: as Multiair is a hydraulic system, wouldn't it fail at high revving? Does someone have an intake/exhaust CFM chart comparision between DOHC no-Multiair and SOHC Multiair heads?
I heard some rumors saying that StarJet's head has a better flow than T-JET's one... Is that right? What are the differences between them, the 1.2 16V FIRE's head and 1.3 16V's one?
Camshafts
What about them? I just know Colombo & Bariani's ones, is there other brand that builds (great) cams? What about Bariani's quality? Is the Road Max a good option for a 400 hp+ engine?
Valve train
Sh**! There's absolutely NOTHING about this one internet. I'd like to have titanium valve springs and retainers, but I can't find even ordinary ones! Nothing about valves (which stuff is better: Nimonic, stainless steel or there's another one? What about valve sizes?) and valve guides as well... I'm accepting suggetions. Remember that I want it to rev 8.5K+... Is there some brand that builds this stuff without special order?
Pistons and rods
AFAIK the original engine is able to handle about 260 hp and 360 nm, so I must buy forged parts. For pistons I heard about ProtoXide, Wössner and a greek brand called DP Pistons. For rods, I just know ProtoXide and EF-Racing ones. So which one is the best? Do someone know anything about their weight, reliability, quality and strength?
Bushings/bearings
Guess what? Nothing on the web once again! As the engine will have to handle a big stroke with small rods at high rpm's, what would you recommend me?
Turbo
This part is easy... I think! I'll swap the original IHI RFH3 into a Garrett GTX2860R together with a Tial QR 50mm BOV. What about the pipes? Should I keep it OEM? Intercooler... Any good brand/size?
Intake
I'm gonna order a special aluminium made manifold together with a new bigger bored throttle body. Wich TBi should I take?
Cooling
Will the original oil and water pumps together with the original oil and water radiators handle the new output levels? What should I do with them?
Cheers and thank you, have a nice week!
I'm about to buy a Bravo T-JET (it's very similar to the Bravo Sport T-JET 150 sold in Europe) and of course it's OEM condition isn't gonna last long. So... today's point is medium to hard T-JET tuning.
Head
First of all I'd like to know a few things about the head. The only T-JET engine fitting our Bravos is the 150 hp variant, that DOHC W/O Multiair one. I'm wondering what's the best one to tune: DOHC no-Multiair or SOHC Multiair? In general DOHC heads are way better than SOHC ones by providing a wide range of cam phasing tuning. DOHC ones use to provide more air flow as well. Other point is: as Multiair is a hydraulic system, wouldn't it fail at high revving? Does someone have an intake/exhaust CFM chart comparision between DOHC no-Multiair and SOHC Multiair heads?
I heard some rumors saying that StarJet's head has a better flow than T-JET's one... Is that right? What are the differences between them, the 1.2 16V FIRE's head and 1.3 16V's one?
Camshafts
What about them? I just know Colombo & Bariani's ones, is there other brand that builds (great) cams? What about Bariani's quality? Is the Road Max a good option for a 400 hp+ engine?
Valve train
Sh**! There's absolutely NOTHING about this one internet. I'd like to have titanium valve springs and retainers, but I can't find even ordinary ones! Nothing about valves (which stuff is better: Nimonic, stainless steel or there's another one? What about valve sizes?) and valve guides as well... I'm accepting suggetions. Remember that I want it to rev 8.5K+... Is there some brand that builds this stuff without special order?
Pistons and rods
AFAIK the original engine is able to handle about 260 hp and 360 nm, so I must buy forged parts. For pistons I heard about ProtoXide, Wössner and a greek brand called DP Pistons. For rods, I just know ProtoXide and EF-Racing ones. So which one is the best? Do someone know anything about their weight, reliability, quality and strength?
Bushings/bearings
Guess what? Nothing on the web once again! As the engine will have to handle a big stroke with small rods at high rpm's, what would you recommend me?
Turbo
This part is easy... I think! I'll swap the original IHI RFH3 into a Garrett GTX2860R together with a Tial QR 50mm BOV. What about the pipes? Should I keep it OEM? Intercooler... Any good brand/size?
Intake
I'm gonna order a special aluminium made manifold together with a new bigger bored throttle body. Wich TBi should I take?
Cooling
Will the original oil and water pumps together with the original oil and water radiators handle the new output levels? What should I do with them?
Cheers and thank you, have a nice week!