At what point will i need an uprated fuel pump and injectors?
27 January 2009, 11:30 AM
#1
At what point will i need an uprated fuel pump and injectors?
Im planning on pushing my WRX wagon over the 300 bhp mark, im going to go for a full turbo back system, de cats, air filter, boost controller, colder sparks.
But at what point does the fuel pump need replacing? i think ill get a walboro just for the crack to be safe. Also how much power can the standard WRX injectors cope with?
Cheers
Also on another note..can anyone tell me what size the prodrive 18 inch 10 spoke wheels are? ive found some on ebay that are 18 x 7.5, but i thought they would be 8.....
But at what point does the fuel pump need replacing? i think ill get a walboro just for the crack to be safe. Also how much power can the standard WRX injectors cope with?
Cheers
Also on another note..can anyone tell me what size the prodrive 18 inch 10 spoke wheels are? ive found some on ebay that are 18 x 7.5, but i thought they would be 8.....
its a 1998 WRX Wagon Import
27 January 2009, 03:32 PM
#4
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Just needed to check out the faq's but just as i thought, if yours is a 98 then its a full 280ps car anyway, your fuel pump should be good to 320-330bhp, its only when you start going higher that i would look at something a little better 
Tony
Tony
27 January 2009, 05:09 PM
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Tony, if you mean full 280ps as i OE, then it's not, wagon came with Td04.
So Ste, you can't push very much more than abt. 260-270hp out of the turbo you currently have.
Your injectors should be (grey top) 380cc, I think they will max out together with your turbo, with OE fuelpressure...
So Ste, you can't push very much more than abt. 260-270hp out of the turbo you currently have.
Your injectors should be (grey top) 380cc, I think they will max out together with your turbo, with OE fuelpressure...
27 January 2009, 05:54 PM
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Tony, if you mean full 280ps as i OE, then it's not, wagon came with Td04.
So Ste, you can't push very much more than abt. 260-270hp out of the turbo you currently have.
Your injectors should be (grey top) 380cc, I think they will max out together with your turbo, with OE fuelpressure...
So Ste, you can't push very much more than abt. 260-270hp out of the turbo you currently have.
Your injectors should be (grey top) 380cc, I think they will max out together with your turbo, with OE fuelpressure...
though the earlier wagons were 220ps running a td04 The funny thing is that early UK wagons ran a TD05 turbo and in 97 changed to a td04!
Tony
Last edited by TonyBurns; 27 January 2009 at 05:59 PM.
27 January 2009, 06:48 PM
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If you're planning 18" wheels it's worth checking the offset requirements. On the new age wagon, certainly, then most 18" wheels will rub against the arches, especially with lowered suspension: a new age wagon (sans flared arches) needs around a 52 offset on 18" wheels, whereas most such wheels are 48. I don't know what the situation is on the classic wagon, but worth checking before you shell out on wheels.
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28 January 2009, 01:49 PM
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The little I thought I knew became even less....
29 January 2009, 10:05 AM
#12
Why not get a decent 2nd hand TD05H 16G (as fitted to early WRX saloons), for about £100? Then get it fitted and, together with your decat/system, swap out inj's for 440s (or 550s), a mappable ECU and a remap at 1.35bar, will get you up to about 330-350bhp...
Last edited by joz8968; 29 January 2009 at 10:11 AM.
29 January 2009, 05:12 PM
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I would stick an uprated pump on any Impreza over 10 years old, for the sake of 80 quid it saves it leaning off at the top end.
29 January 2009, 08:24 PM
#15
- but spools up nice and low down, similar to your TD04 
. However, if you reckon you'll only be happy this side of 350bhp, then get a VF35 or VF34. Always available 2nd hand on here or eBay...
Last edited by joz8968; 29 January 2009 at 08:28 PM.
30 January 2009, 09:06 AM
#16
Yeah, it would be easier getting a turbo of similar vintage, as it'll be front entry and replace your TD04L without changing intake hose, etc. I think the MY98 STi turbo is a VF24. Considered a 'small' turbo, but should be good for 300bhp - maybe more? - but spools up nice and low down, similar to your TD04 . However, if you reckon you'll only be happy this side of 350bhp, then get a VF35 or VF34. Always available 2nd hand on here or eBay...
- but spools up nice and low down, similar to your TD04 . However, if you reckon you'll only be happy this side of 350bhp, then get a VF35 or VF34. Always available 2nd hand on here or eBay...
I have no idea if it needs a recon or not. Ive checked it and theres no play etc and the blades seem in a good condition. What is it off then?
30 January 2009, 11:13 AM
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you doubt wrong
will bolt straight on as your current turbo should be front entry.
You just need to use a VF banjo oil supply bolt rather than the td04 one, injectors and an ecu and remap and you are away.
Simon
will bolt straight on as your current turbo should be front entry.
You just need to use a VF banjo oil supply bolt rather than the td04 one, injectors and an ecu and remap and you are away.
Simon
30 January 2009, 04:21 PM
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the td series are unrestricted large hole banjo bolt.. the VF are smaller with a restrictor.. something like 0.8mm.. although best if you get the banjo bolt with the turbo to be sure it is correct
Simon
Simon
03 February 2009, 02:42 PM
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If you find the vf 34 dont fit your car I will buy it from you just what I am looking for to replace my vf 28 and you can buy the correct one to fit your car without messing around drop me a pm any time
drop me a pm any time
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