hi guys time is close now to put my mods on my car and of course my simtec wahoo right my mods are sti ver 4 tdo5 20g sti top mount 980cc injectors fuel reg 3inch open neck decat full exhaust system walbro 255 feul pump 3 port boost solenoid and then my simtec ecu.

so what power gains will i be looking at roughly or has anybody got a similar setup

thanks again guys

 

20g's top at about 380 - 400 do they not? I would think that would be the range you are looking at.

 

really that much i hope so then i didnt think that much to be honest i thought 330 ish

 

It should manage 350 no problem, its going to depend what your clutch / gearbox and all the other bits will allow.

 

If it's a proper 20G then 380/400 is possible.
I'm running a 20G and made +380 on a very safe map.

I'm guessing your using an uprated clutch buddy ?? Just be aware that your standard box isn't the strongest and won't last long at +360 bhp.

 

As above a andy forrest or harvey smith td05 can run 380+ , inferior copies from ebay may or may not make that power and even if they do its a question of for how long.

 

thanks lads its af 20g so decent one and ive got greedy clutch but i know the boxes are ****e in them im on the save for a six speeder

 

If you take it steady your box will survive for a little while. No launches !!!! Just be a bit considerate with it buddy. Mine ran for a good few months at 390 before 4th / 5th started getting crunchy.

 

sound mate im not into launching anyway to be honest doesnt interest me puts alot of stress on everything i dought mine will be 390 i rekon 340ish ill be happy with that tho to be honest

 

It will make more than 340 buddy. You could ask for a low boost map to keep power down and then go back for a map adjustment when youve saved up for a box.

What I opted for was a 754 box from a P1. The 6 speeds are fantastic but are alot of money. I couldn't justify £2K+ for a box and have heard of guys running 420+ on P1 boxes. Just something to think about if your not planning on going for big power. I picked up a low mileage P1 box for under £400 and it came will shafts, diff etc etc.

 

yea mate sounds good 2k is alot of money i wont be going for big power tbo less than 400 plenty enough for me mate

 

what car is this be done to?

 

First line of first post

 

Are your 980cc already fitted? If not I'd sell them (for good money) to someone looking for a high bhp build. They are overkill for a 20g, and might lead to unwanted and unnecessary low speed fuel consumption and/or rough idle/running, etc.

550s (or 650s) will do you fine and should net you some cash in the selling and buying processes.


P.S. My 20g (ultimately, of unknown origin - but has been running sweet since Nov 2010) made 362 on V-Power at c.1.4bar. For some reason my particular combo of mods won't allow it to hold anymore boost than that. But despite its 'lowish' bhp, I absolutely love the way the car gets down the road - it absolutely flies. You won't be disappointed at 340, let alone 380+!!... And as said, the 340 mark will only help in prolonging your engine/box - so positives to be drawn either way.

 

i wouldnt go for 550's if you want to get the most from your 20g 650's would be fine tho. I maxed out nismo 555cc injectors at around 370bhp on my 20g with a bump in fuel pressure too ! changed to 850's and went on to make 436/460 tho

 

a 20G for 340hp. there is only so much lag you can map out.

 

I disagree about the the infamous "20g lag". Mine - at 'only' 362bhp - feels not dissimilar to the car's old OEM VF28!, but obviously much faster and hurls itself to the redline with mental gusto. Of course, I'd have prefered it if it had made the 'expected' 380+... But despite that, I have no complaints.

Of course, it helps that the master, JGM, has mapped it with a wicked boost profile.


That said, if the OP's INTENTION is to only have 340, then obviously a decent 2nd hand VF35 or 34 is MORE suited.

 

agreed a VF would be a much better turbo option for that power level.

 

already got 20g now so thats going on and at least if i keep injectors i will never need to replace them will i? simon jgm is fitting my simtec so should be good i would love 370 but im just abit negative about my own car i know my mods can do it but i always thing negative cant wait to have it done im sick of s2000s making fun of me lol

 

Assuming your STi topmount is from a New Age, there's no reason why shouldn't make that power given your spec.

650s would be more than adequate (with WGDC headroom to spare). No point in fitting 'thirstier' 980s.... Unless you KNOW you'll carry on modding and chasing more bhp later on. Also they may lead to rough low down running due to lack of resolution at low WGDC i.e. too much fuel being let through at low WGDC openings.

You're like me; very much a glass half empty person... And for good reason - only made 362 on my 20g.

 

i will be modding more tbo i will get my bits fitted see ho
w it goes push it as much as i can then start saving for fully forged 2.1 might aswell lol time will only tell when it all goes on fingers crossed for half decent power i bet yours goes well then mate at 360

 

pfffttttt 360 is mere child's play aint it joz

 

She does go nice, yeah.

But as bigsinky eludes to, unfortunately, you do seem to always hanker after more! 450+ odd would be nice.

But unless I get a ScoobyClinic 'box or OEM 6sp, and a forged build (colossal bucks! ), then further power chasing is a no-no for me, I'm afraid.

 

My 20G made 390 and After Paul and I looked over old dyno sheets it showed the 20G spooled far quicker than my VF28. I'm using RCM 550's which were pretty close to their limit.

 

I agree about spool - mine feels very similar to the VF28. Obviously not quite as spooly - but certainly not a 'lagatron' as perceived/reported by some on here.

My 550s are at 90% IDC (at 362bhp).


Excellent 390 you made there (lucky sod )

 

you guys want to get yourselves a proper turbo.

 

Try getting two like Andy F

 

Is that a GT35 vs a TD04?

 

td04 yes. gt35 no. its an ITS turbo i think.

 

Sure. But is it not equivalent to a 35, or 30, or similar? Certainly 'looks' like that sort of turbo....???