My Budget 300bhp St185

MrDB

New member
Mods as per signature pic and below

So total expense for 300bhp. & 290ft-lb @ .9bar (a lot of ebay bargains)

No det and good A/f ratio...

£10 MHG ebay
£20 FMIC ebay (was given pipes as a thankyou for help)
£30 ProfecB boost controller ebay
£350 Exhaust
£100 Downpipe
£700 ish Turbo ( turbo Technics Hybrid / modified single exit wastegate )
£50 Air Filter
£10 BOV ebay

Total £1270 so £12.7 per bhp increase im happy with that

Torque falls away as im outside the range of the turbo need to be running 1bar at least so more hp to come once fcd is in...

Dyno.jpg


Pipe from turbo over heatshield has now been lagged since this photo.
intercoolerpipe.jpg


tubby3.jpg


tubby2.jpg
 

MrDB

New member
many thanks unfortunatly i didnt get a copy of af ratio just saw it on screen. Dyno operator was impressed and said combination worked well just a tad rich and seemed to have scope for more...
 

MrDB

New member
Im fitting my FCD and upping to 1bar maybe 1.1 if all is ok and then getting another RR done will get printouts done of Boost / af etc this time..

I have my wedding this week so maybe a few weeks before i get it redone..

Who says 300bhp is hard to get on a 185! :)
 

ST185pinjo

New member
Congrats on your wedding.

Do you remeber what AF you had? What is the spool like(at what rpm do you see 0.9bar)?

That is a real bang for buck setup. :D

Did you up the base pressure?

According to this site(http://memweb.newsguy.com/~gtfour/fuelreqr.htm)
If everything is stock, you have fuel for about 260 HP(90%duty). I don't know the A/F this guy used, but his car is still running. You running 300 hp on 440's and stock FP can mean leaning out and BOOM. So be carefull.
 

MrDB

New member
Many thanks on wedding!

Pressure is std whatever that is ( it varys ) and was still a little rich but agree its prob at about 100% duty.

To be honest i think Fuel pressure plays a big part in most setups on std injectors and fpr on what you can get power wise. The variation in pressure on a std regulator ive been told is significant so some are low and some are high. 440's at the right pressure act like 480's so you have some scope. When i took the head of not long ago there was no sign of det or running lean.

I only run at this a few times so not always at max boost.
Injectors run 100% duty almost at anything above stock boost as long as fuel is there it sould be ok and i dont rag it everywhere only occasionally.

Spool on this turbo when on std topmount was only slightly higher than my std ct26 and with front mount is still amazingly good. From memory .9bar about 3.5-4k and usable boost about 3k Where torque peeks on graph is around 4200rpm

One thing i do know is that formulars are only best fit i know of many a 300+bhp car running 440's that are perfectly fine but that site still states not enough fuel... Only real way is RR with af ratio....

they give you a good estimate on requirement but its not exact science. Does not take into accunt atomisation etc only the theory...
 

smog7

Moderator
and people think ct series turbos arent good for anything. good stuff! any specs on the turbo?
oh and congrats on your marriage!
 

MrDB

New member
To be honest i havnt got the specs as i was recommended it from a fellow gt4 owner ##BETSY## ( hes running one on a powerfc and 350bhp ). Its model num is s148 available from Turbo Technics. Has single wastegate so no boost creep good for 1.6bar and 380bhp apparently which i think is possible. Judging from mine.

http://www.turbotechnics.com/docs/turbo/s148.htm

also do a stage 2 of this not sure on performance of this as i dont know anyone who has had it??
http://www.turbotechnics.com/docs/turbo/s175.htm
 

Corey

Active member
So does this turbo bolt right up with stock lines?

Any issues with it thus far?

Impressive numbers!
 

MrDB

New member
Yes fits 100% as stock! No issues so far. Still eating scoobies! ;)

1bar is nice hopefully upgrading to a bigger cosworth intercooler as now summer is hear intake temps are creaping up ( nothing serious ).

Also considering a link ecu if money and wife permits lol

Std clutch still holding also!
 

BayAreaAT

Active member
This is great news specially for us low budget guys.. I talked to RickyB about dyno tuning my car which has way more stuff than yours, and he told me that he doubt ill see 300HP with stock cams. This definitely got my hopes up.. :D

congrats on that great numbers..
 

MrDB

New member
@ the fly hp mate!

"I talked to RickyB about dyno tuning my car which has way more stuff than yours, and he told me that he doubt ill see 300HP with stock cams."

cams actually will make only a small difference and then only mainly exhaust cam. Turbos respond less to porting/cams than NA cars.

300hp is cheapishly possible on a healthy engine.

Add ecu and injectors to my setup and 1.2-4bar should see 350 easily...
 

Corey

Active member
What kind of AFR are you seeing with this turbo?

No aftermarket fuel pressure regulator or anything right?
 

MrDB

New member
Never got the printouts sorry. |However i did speak to the operator, (been to the place a lot) and he said all was fine and still a tad rich at the top. As i said i wouldnt go thrapping around all day with it at this boost but the occassional sprint isnt that bad.

Also im now considering an link ecu so i can at least get bigger injectors running to make sure i can drop the duty on them...
 

tw2

New member
You running 300 hp on 440's and stock FP can mean leaning out and BOOM

Thats a great setup. The stock fuel is supposed to support 270 WHP not BHP which is why this setup works as I guess it is around 250WHP. Near max but probably not boom.
 

MrDB

New member
Thanks, definatly not boom its been fine for quite a while now, i do need to get a 1/4 mile done though...

I remember when i first got a 4 (5yrs ago) 300hp seemed to be a holy grail on a 185 but i see more and more now coming along and doing it cheaply, i guess people learn from other peoples mistakes and we progress.

I am a strong believer that less is more with tuning. I doubt i will ever go over 300whp so this turbo is perfect. Exhaust isnt huge and will cope with that power, intercooler will need updating but i have one coming from a different model which is bigger. With the ECU and bigger injectors i should be there. For the street it will see off almost anything but big money cars so i will be happy.

I see so many people running 500hp turbos on 300hp engines they get the bragging rights but also get all the lag and will perform worse than a smaller turbo....

Build for what you want. Dont go huge intercooler get the size thats suitable for the power you want to get and add little more same for all components. All race cars are designed that way if you build in to much headroom for the future you will suffer until you reach the higher power levels...

I have friend who has a 165 pushing no more than 270 fly hp that is beating many a more powerful car (300 - 400 hp) in a sprint series as he can get more power out of the corners quicker due to his spool time being smaller hes efficient and thats the key....
 

MrDB

New member
Some more updates.

Intercooler
frontmount.jpg


Not my actual one but same type.
intercooler.jpg


DIY clear indicators

DSC00016.jpg


Intake temp monitor ( this temp was heatsoak with std top mount )
tempguage.jpg


DIY rear ARB ( ignore welds it was my first go ever at welding ;) )

DSC00186.jpg


IMG_0929Small.jpg


DIY Brake Stopper

DSC00321.jpg


Dsc00322.jpg


Also update on turbo's possible power output this same turbo on a 185 engine with 205 cams 205 intercooler and powerfc ran 377hp @ fly so its a capable bolt on ;)
 
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