porszak
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Registered: 3rd Jul 06
Location: PoLand
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i'm just finishing my little project c18xe smallblock (rebored c16xe with z18xe crankshaft and pistons) but have a few questions.
I have mantzel style intake, 56mm throttle body (50mm std), 264degree schrick cams, 4-2-1 SuperSprint exhaust manifold and then 2.25 rest of exhaust
which injectors should I looking for? from c20ne, xe or anything else?
rev limit will be at 7500 - 8000rpm. i expect max190hp but it is very optimistic power, 170 will be nice
what kind of head job should be done for this setup??larger inlet runners, bronze guides? std valves will stay on their place
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Robin
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Registered: 7th Jan 04
Location: Northants Drives: Clio 182 Cup
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use C20XE ones, with a remapped ECU, that should work for you.
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Robin
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Registered: 7th Jan 04
Location: Northants Drives: Clio 182 Cup
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Oh, and provide plenty of pictures and power figures 
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DAZ1985
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Registered: 3rd Sep 06
Location: Scholar Green, Cheshire
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Cream or blue xe injectors though?
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Dave A
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Registered: 10th Dec 03
Location: County Durham
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I looked into the c16xe head onto the z18xe crank and pistons setup but the pistons would protrude about 2mm out of the top of the block.
how did you get around this? spacer plate?
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Vaux Lad
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Registered: 15th Dec 04
Location: Stoke-on-Trent
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quote:
Originally posted by DAZ1985
Cream or blue xe injectors though?
Depends on what fuel pressure he'll be using.
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Superlite Ltd.
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Registered: 9th Jan 07
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cream injectors, i think blue would be too much IMO
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Dave A
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Registered: 10th Dec 03
Location: County Durham
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get some proper management on their and 160 bhp will be a good target.
all that spec and no tb's will be the limiting factor on power figures plus you will still have the massive lack of lower down power (under 5000rpm)
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Vaux Lad
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Registered: 15th Dec 04
Location: Stoke-on-Trent
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I assumed he would be using proper management, seems completely pointless to do all that, then just run it on a std map.
To be fair, i dont see the lack of multiple bodies be a cause for much of a power loss, a well designed plenum setup with a single tb can be as effective and probably give more torque too. As long as the tb size doesn't cause a restriction.
[Edited on 13-07-2007 by Vaux Lad]
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Dave A
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Registered: 10th Dec 03
Location: County Durham
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some engines work better with a single tb. generally the smallblock xe's dont.
ive yet to see an engine on a standard lower inlet make any more than 161. (a mates nova with mantzel, 270+ cams, omex, headwork, proper manifold and exhaust system) and that was a very very good engine.
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porszak
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Registered: 3rd Jul 06
Location: PoLand
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pictures and graph right after engine starts and remap will be done
for now many pics You can find here, it's our polish forum CTM (corsa tuning masters) Club
http://www.forum.tuning.info.pl/viewtopic.php?t=52957
all my pics are in the first post
Whole engine is c16xe only crank shaft and pistons are from z18. z18xe pistons are shorter than c16xe, so now pistons are 0.6mm lower than block surface. this pic show this
http://www.fotosik.pl/pokaz_obrazek/4254be57f09fd362.html
fuel pressure will be std, provided that std isn't to little
ecu remap is obviously thing
multiple bodies or itb are the plans for future
i believe You can understand me, i know i'm doing many mistakes
[Edited on 13-07-2007 by porszak]
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Vaux Lad
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Registered: 15th Dec 04
Location: Stoke-on-Trent
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quote:
Originally posted by Dave A
some engines work better with a single tb. generally the smallblock xe's dont.
ive yet to see an engine on a standard lower inlet make any more than 161. (a mates nova with mantzel, 270+ cams, omex, headwork, proper manifold and exhaust system) and that was a very very good engine.
Was that with a standard sized throttle body?
Still, a 50/60bhp gain over stand with the standard throttle body/part inlet is a very good result indeed.
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Dave A
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Registered: 10th Dec 03
Location: County Durham
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quote:
Originally posted by porszak
pictures and graph right after engine starts and remap will be done
for now many pics You can find here, it's our polish forum CTM (corsa tuning masters) Club
http://www.forum.tuning.info.pl/viewtopic.php?t=52957
all my pics are in the first post
Whole engine is c16xe only crank shaft and pistons are from z18. z18xe pistons are shorter than c16xe, so now pistons are 0.6mm lower than block surface. this pic show this
http://www.fotosik.pl/pokaz_obrazek/4254be57f09fd362.html
fuel pressure will by std, provided that std isn't to little
ecu remap is obviously thing
multiple bodies or itb are the plans for future
i believe You can understand me, i know i'm doing many mistakes
exellent work, I looked into doing this but decided to stick with the 1600cc rather than increase the throw on the crank and the increased stroke may not like the high revs.
keep us updated, what did you bore the block to in mm?
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porszak
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Registered: 3rd Jul 06
Location: PoLand
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i bought c16xe in very good condition with about 150 000km (~94 000 miles)
at first i was not thinking about that kind of modification, but few times when i looked on the Mantzel www side, i saw last stage modification of c16xe. that's how it was started
i've found one corsa (on the web) in France with that stage
yep big stroke doesn't like very high revs. i think engine would not need higher than 8000rpm or even 7500
bore is 80.5mm with cylinder/piston clearance 0.04mm
[Edited on 13-07-2007 by porszak]
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Dave A
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Registered: 10th Dec 03
Location: County Durham
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small clearance!
most clearances for pistons is around 0,07-1mm, depends on the ring gaps I suppose.
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Dave A
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Registered: 10th Dec 03
Location: County Durham
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anyone got the measurement from the centre of the gudgeon pin to the crown on a z18xe piston?
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porszak
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Registered: 3rd Jul 06
Location: PoLand
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opel in EPC wrote std clearance for z18xe 0.02 to 0.04. z18xe pistons are short, shorter than c16xe's (0.01-0.03)
short piston shouldn't has big clearance, difference in clearance between c16 and z18 is caus of piston material in thic case
measurement from the centre of the gudgeon pin to the crown on a z18xe piston is 24.1mm , and 28mm in c16xe. difference is 3.9mm (don't forgot piston is 0.6mm lower than block surface) =3.3(5)mm= half of stroke
difference between stroke c16 and z18 is 6.7mm
@Dave clearance You wrote is for forged pistons in turbo engines
what about head advice?
[Edited on 13-07-2007 by porszak]
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Superlite Ltd.
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Registered: 9th Jan 07
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http://www.injectorcleaning.co.uk/index.htm
They have a flow rate chart which might help you.
I recon X18XE or X20XEV injectors 
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