Exhaust manifold and friends

[-Jo-]

not looking for "VUK" power
Good luck!!

never heard off that ???

 

[Lee_R21Turbo]

for the injectors i will have to look into the required fuel flow and the idle pulsewidths, because the car has to be drivable around town etc etc so the last thing i want is a ripsnorting thing on boost and a lumpy hunk of crap off boost lol. i am willing to sacrifice the peak power for drivability.

That isnt down to the injectors as such thats down to whoever maps the car - a good mapper will get the idle, driveability on/off boost perfect anyway! I had a standard management chip running 803s and it ran perfect everywhere!!

not for 250 bhp mate. I only use 803's from 250-300. The 804's (337cc) are good for 250, max 260.

I'd rather not run injectors at 90% duty cycle to be honest! Infact as a rule of thumb anything over 75% is a tad risky (although there are other factors) - you may aswell just have them permanently open! LOL! :icon_wink:

 

[Lee_R21Turbo]

never heard off that ???

Its Phils reg you foreign goon!!! :icon_razz::icon_razz::icon_razz:

 

[dangerstevie]

If the injectors are so big the idle pulsewidths drop much below 2ms it can be very difficult to get a good steady idle, the turbo mx5's when pushing over 250bhp (from the 1.6) really struggle with idle unless extra injectors are used because the injectors are that big to fuel for the peak power that they are barely opening and not giving proper distribution/spray pattern at idle.
unless its not that big of a deal for the 2.0l 8v motor?

 

[-Jo-]

I'd rather not run injectors at 90% duty cycle to be honest! Infact as a rule of thumb anything over 75% is a tad risky (although there are other factors) - you may aswell just have them permanently open! LOL! :icon_wink:

they are at 70% duty for 250 (flywheel, not at the wheels). My 803's where set up at 92% just before they where swapped for the deka's (550cc).

@dangerstevie, its all in the mapping. My car is overfuelling on idle, logic, its set up with a mahoosive icon_biggrin rallycam at 1300 rpm and steady. No bouncing in the revs.
Phil's "VUK", thx Lee (lol), does 1100 rpm steady with the 803's and 276? cam.

 

[jonboy21t]

Its Phils reg you foreign goon!!! :icon_razz::icon_razz::icon_razz:

LOL - my thought's exactly...!!

 

[dangerstevie]

Fair play, i was getting pulsewidths of 1.2-1.6@ idle with 205cc injectors in my mx5 on throttle bodies, and that used to hunt like hell, i managed to change the fuelling algorithm and gave it a hefty ign advance ramp just below idle and a dip just off idle to give it a trough so to speak to sit in and that pretty much solved it but any bigger on the injectors and it would have been very difficult to get it right.

 

[DaveL485]

My old 21T was setup and dyno'd at europarts motorsport at 249bhp and 248lbsft at 16psi.
.

Ha ha ha ha ha ha ha ha ha ha.

Possibly THE most generous rollers in the entire universe.

 

[DaveL485]

I Did quote a bunch of posts from the thread but in the end decided not to. lol.

Steve- Do your mods. Set it up. Tweak and tune it. I Believe you're round the corner from me so pop over and we'll have a play, you can check out a 'proper' exhaust like the guys have recommended on my own car. It makes such a difference. (ETA-With ext.WG and screamer pipe too)

Get it to drive how you want it to. Make it quick.

Then when it's just right, when it's got midrange and top end, rips the nuts off most things on the road bar supercars and big budget japs, flip the bird to the rollers cos it dont matter a ****e....it whether or not you're happy with it or not that counts.

If my 12v NoS'd standalone heap of bollocks makes me turn to jelly and screech "WIBBLE" every time I nail it, I dont care if it shows 14.1bhp. It makes me Wibble. Which is the endgame. For me, anyway.

 

[dangerstevie]

Dave ur a legend.....no doubt i will be round when i have aquired the car and i would love to see your exhaust manifold setup etc.
Cheers

 

[administrator]

Dave ur a legend.....no doubt i will be round when i have aquired the car and i would love to see your exhaust manifold setup etc.
Cheers

Just be careful what else he offers to show you. He tried some bizarre manovers when I popped round

 

[-Jo-]

ive just seen the products from FBI-motors. I now that they had a tubular (standard internal wg) but didnt seen the one with EXWG connection. Dont know if its tested by any off the french guy's.

@Dave, they have also one with external for the 12v.

 

[dangerstevie]

Thats the stuff i am looking at, reasonably priced too, standard manifold seems a little expensive at 280 but if the quality is there and it never needs to be changed again, its well worth it.

 

[-Jo-]

brandnew standard manifold (cast) is about the same price. I'll prefer the cast instead off S/S. The standard manifold is one off the best designs on the J7R. They handdle easy 300+ (no pub bhp, wheelpower)

 

[administrator]

Jo ,

on this pic :


the whole engine bay looks a little special. I notice an external wastegate , the trick manifold , but what has been done to the block , it looks fantastic !

 

[-Jo-]

thats a 12v mate, Dave got the same one.

@Dave, remember whe had a chat about the valves ? Henk and Menno told me that the exhaust side is the same material as the turbo version. Dont know how you say it in englisch, but natrium something...

 

[administrator]

Jo ,

I think I am needing a 12v . Simply cos it looks awesome !

 

[Lee_R21Turbo]

thats a 12v mate, Dave got the same one.

@Dave, remember whe had a chat about the valves ? Henk and Menno told me that the exhaust side is the same material as the turbo version. Dont know how you say it in englisch, but natrium something...

Jo - Sodium?

 

[-Jo-]

Jo ,

I think I am needing a 12v . Simply cos it looks awesome !

got one for ya, including 2.2 bottom end with custom steel liners and custom JE pistons. The only thing it needs is make a connection for the oil return (turbo).

Dont forget, the 12V head need some modification. Waterconnection is located on the inletside and exhaustside. You need other valve's on the inletside, the original 12v's aint strong enough and not resistant for high temps.

Its also possible to fit the 8v turbo head on the 2.2 bottomend. Thats what i did, in combination with cossiestyle inlet.

 

[-Jo-]

Jo - Sodium?

I have no idea mate, thats totaly not my section. I know that there are S/S valve's avaible and also Titanium's. The last ones are pretty expansive, about 200? / piece.