furryeggs
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| posted on 2/9/17 at 07:40 PM |
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ST170, Do I do it???
I have a little dilema that i need the combined knowledge of you locost geniuses to help me decide.
I reckon i am no more than 20hrs worth of work away from completion and IVA. I have currently got a 2.0 blacktop on TB's and emerald K3 ecu
which other than a little tuning is running and driving. I have however got a slight g/box leak from between the bell housing and case so the engine
g/box has to come out for me to sort it.
This is where my dilema comes in. I've just been offered a complete running st170 engine inc loom and auxiliaries for £250 delivered, (its still
currently in the car).
As I am having to remove the engine/gbox anyway should I go for the ST engine, swap everything over and drop that in instead, and run a few extra
wires for the vvt. Is the st block the same as the blacktop in regards to the race line sump, alternator, engine mount positions etc etc. I
don't want to have to buy more bits if i have to. Or should i just stick with my current set up forget the ST.
I'm not in a hurry to get the car through IVA as without a screen, heater etc its getting close to the wrong time of the year for it anyway.
Stoneliegh 2018 will be my target date.
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big_wasa
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| posted on 2/9/17 at 08:21 PM |
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If you want a bit more power then go for it.
Every thing should bolt across but some people have said that the odd drilling has not been tapped. I've not found this.
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kingster996
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| posted on 2/9/17 at 08:28 PM |
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Not worth the hassle in my opinion. K3 won't run vvt. So stick with blacktop.
I used to be indecisive, but now I'm not so sure
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obfripper
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| posted on 2/9/17 at 08:40 PM |
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It will bolt straight in at the engine level, however you have several options to sort the management.
Change your ecu/loom for either the stock item and swap to a stock inlet manifold and fuel pump/controller.(probably not posssible due to space
needed.)
This will give stock power, but a guaranteed way to pass the emissions test with a cat.
Use a vvt delete kit to lock the cam in a fixed position and use your k3/itb's.
The k3 does not support closed loop vvt control that is needed to give a good torque curve, the vvt pro box is specifically for this purpose.
https://motorsport-electronics.co.uk/st170-vvt-control-cams-delete-vvt-pro.html
This will control the cam timing to a target map, and afaik you tune the main management as a normal engine.
Expect 190-200bhp on itb's and a good torque curve with vvt control, and the same power but a peaky torque curve with a vvt delete.
Dave
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snapper
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| posted on 2/9/17 at 09:11 PM |
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IVA it as it stands and upgrade after
Trust me on this one
I eat to survive
I drink to forget
I breath to pi55 my ex wife off (and now my ex partner)
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cliftyhanger
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| posted on 3/9/17 at 08:42 AM |
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And don't forget the inlet manifolds are different. They will swap over and bolt up, but the ports are out of alignment (so wasting a fair
amount of power...)
All fixable.
I have an ST170 in my spitfire. GSXR ITB's and homebrew exhaust as packaging requirements were awkward. But primaries are 26"long so
pretty good, however shape is a slight issue. But all that with VVT gives approx 175bhp on the Bailey rolling road. Reckon a better exhaust would give
another 10, and a day that didn't have mad temps (my corsa expansion tank started to melt, I kid you not!) probably held another 10 back.
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coozer
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| posted on 3/9/17 at 09:11 AM |
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I would leave the blacktop as is and spend your money on cams. Hindsight is wonderful...
1972 V8 Jago
1980 Z750
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MikeR
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| posted on 4/9/17 at 12:21 PM |
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get it IVA'd and then have a project for next winter.
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