Time for tuning

ChEsTeR · #1 25-05-2007, 09:51

TD04 will fit but with a new exhaust mainfold. If the head bolts were used ones u can use them. I the head was ones of i sugest u get new ones.

Conkers · #2 25-05-2007, 11:06

Why do I need a new exhaust manifold, the bolt fittings on the Saab TD04 and T25 looked identical, I compared the two, will need to rotate the compressor housing 90 degrees or so, but not sure about the exhaust elbow.
But size wise, they looked similar and most important for me wanting to retain the standard exhaust manifold the bolt fitting was the same.
Tell me if I have missed something...

I have both a T25 and a TD04 to choose from, both from saab... the TD04 is more modern technology and I am assured by my mapping guy that it will spool up a little faster and keep the boost longer...

But with 2 weeks to get this baby ready... all advice and opinions are both welcome and appreciated.

Mike.

ChEsTeR · #3 25-05-2007, 11:22

The only TD04 i saw was from volvo and the bolt patern was diferent as well as downpipe had to be custom made. And Yes TD04 spools nice but it can make a bit less power then the T28.

Conkers · #4 25-05-2007, 13:04

As we are making a gentle engine I dont think we are worried about total power figures, we will be happy with 200bhp +/-20bhp with minimal spool up time.

The Saab td04 I have and the saab t25 have the same manifold pattern, but I guess we will find out more next week.

Mike.

CNHSS1 · #5 25-05-2007, 14:05

sorry for the late reply, only just re-visited the thread. wiseco DET pistons are what i use in my engine, but with forged s13 rods. they will fit with std s12 rods (gudgeon pin fit is a pain though), but not a lot of point as std s12 rods will be a limiting factor long before the pistons are. Std s13 DET rods are a fair bit thicker, pretty cheap over here (£20 for 4 i think i paid for a mates engine) and will mean you have a pretty bullet proof bottom end for 300-350 with forgied pistons and DET rods.
i realise my reply is soemwhat late, but may help you in the future.

Conkers · #6 07-06-2007, 11:03

I'll have the cam back today, hopefully... and we settled on a T25 from a saab as we got one for free from a mate, had to turn the center housing to align the oil drain, and also the inlet housing to give us a chance of plumbing it... volvo 740 intercooler is ordered too... rising rate fuel regulator, ported head, balanced bottom end, got some 12,9 socket caps from a bolt supplier, as nobody could get us head bolts in a hurry, hope they hold up, remap is booked for june 22nd so fingers crossed that we make the first drift event on june 29th... and that nothing goes bang before (during or after) then.....

Thanks for all your help...

Conk.

Conkers · #7 12-06-2007, 18:10

The engine is back together now, putting it in tomorrow.

The enem cam grind was a Z10 M20, and timed up nicely without requiring a vernier pulley.

I had te injectors cleaned and tested, they will flow 289cc per minute, which att 100% will provide fuel enough (@ 3,5bar) for 205bhp, theoretically. So might have to up the fuel pressure to 4bar, which will be good for 200bhp at 85% duty cycle.

I guess the next step wold be some larger injectors...? WHat are they from and how much do they cost...? This engine build is skyrocketing in cost.... he he...

I'll let ya know when she is mapped..... what the final outcome is....

Conk.,