project 450
#1
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project 450
hi guys
just to let you know about a little project me and my friend (mark28) have started
background:
the car was a standard wrx with mods including a vf22 440cc injectors and a fmic mapped to an apexi by paul from zen
although the car ran fine there were a few problems, firstly the engine had done 108000 miles and secondly i wanted more power
so i bought myself a newish engine from worbs
the engine is 2.0 litre turbo block bored out to 2.2 using wiseco pistions, zen rods, ARP bolts, metal head gaskets,acl bearing, fully worked sti4 heads,parrell fuel rails with fpr the list goes on and on
plans
now having the engine installed with lightend fly and uprated clutch which took just over six hours to remove and refit see pics im now at the stage of choosing turbo and injector combination fitting a catch can, air intake, new battery and other ancilleries with the hope to have it up and running and entered into next years scooby shootout
i will keep updating the thread as i make more progress and get some pics up. but here is some to keep you going
just to let you know about a little project me and my friend (mark28) have started
background:
the car was a standard wrx with mods including a vf22 440cc injectors and a fmic mapped to an apexi by paul from zen
although the car ran fine there were a few problems, firstly the engine had done 108000 miles and secondly i wanted more power
so i bought myself a newish engine from worbs
the engine is 2.0 litre turbo block bored out to 2.2 using wiseco pistions, zen rods, ARP bolts, metal head gaskets,acl bearing, fully worked sti4 heads,parrell fuel rails with fpr the list goes on and on
plans
now having the engine installed with lightend fly and uprated clutch which took just over six hours to remove and refit see pics im now at the stage of choosing turbo and injector combination fitting a catch can, air intake, new battery and other ancilleries with the hope to have it up and running and entered into next years scooby shootout
i will keep updating the thread as i make more progress and get some pics up. but here is some to keep you going
Last edited by chris_wrx; 28 September 2007 at 08:47 PM.
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gear box yes i think i will need a ppg set up but ill wait at the mo
as to turbo i havent a clue possibly a md321t but i havent got 1250+vat lying around
also i need to know what injectors to have
as to turbo i havent a clue possibly a md321t but i havent got 1250+vat lying around
also i need to know what injectors to have
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chris we have spoken many time's about this subject, i have given you many options for what you can use/do to get to the power levels you want.
just hurry up and decide as sso will soon be around
just hurry up and decide as sso will soon be around
#13
The Lateral Modified 550's look like 550's, are as controlable as 550's (which can't be said for the standard 740's) but flow more like 850cc
They are more than up to the job
They are more than up to the job
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In my opinion, go for higher fuel pressure and smaller injectors. Higher pressure through the injector gives a better spray imo. Running 90% duty is easily safe enough, leaving 10% for error.
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I ran my 740's with a 2 litre fed by a VF28 for 18,000 miles with no problems whatsoever. Idle was great and fuel economy was better than the 440's were. This was with a walbro and SX reg.
I am now using the same 740's but with a 2.5 powered by a GT30R and they are still excellent.
All this tosh about them being too big, won't idle, cant control them blah blah blah.
Been there done that with excellent results too.
With the 2.0L VF28 the car idled perfectly at 850 rpm solid.
Its now doing the same with 2.5 GT30R setup
If you use a decent mapper then he'll be able to get the 740's to do exactly what they need to do.
Yes the Modified 550's are the better injector but they come at a premium.
740's for £250 is an utter bargain. Go for them they'll more than suit your current and future needs.
Daz
I am now using the same 740's but with a 2.5 powered by a GT30R and they are still excellent.
All this tosh about them being too big, won't idle, cant control them blah blah blah.
Been there done that with excellent results too.
With the 2.0L VF28 the car idled perfectly at 850 rpm solid.
Its now doing the same with 2.5 GT30R setup
If you use a decent mapper then he'll be able to get the 740's to do exactly what they need to do.
Yes the Modified 550's are the better injector but they come at a premium.
740's for £250 is an utter bargain. Go for them they'll more than suit your current and future needs.
Daz
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The 'modified' injectors that Tim is referring to are available through many, LP, Zen, ourselves etc and are used in many high powered cars with no problems.
The donor phase 2 injectors, as required in this case are, would be 440's and are modified to flow approximately 740cc at standard fuel pressure and the flow rate will increase with increased pressure.
The spray pattern is vastly improved over stock, directing the flow to both intake ports and as a result atomisation is improved resulting in a more efficient burn.
Expect to pay around £150 for the conversion which includes ultrasonic cleaning and a 'matched' set in return for your money. Your donor set will more than likely show a disparity in flow which will still be present after the conversion so sets are matched from existing stock.
The donor phase 2 injectors, as required in this case are, would be 440's and are modified to flow approximately 740cc at standard fuel pressure and the flow rate will increase with increased pressure.
The spray pattern is vastly improved over stock, directing the flow to both intake ports and as a result atomisation is improved resulting in a more efficient burn.
Expect to pay around £150 for the conversion which includes ultrasonic cleaning and a 'matched' set in return for your money. Your donor set will more than likely show a disparity in flow which will still be present after the conversion so sets are matched from existing stock.