Swirl Posted September 25, 2018 Posted September 25, 2018 This morning I met up with a very nice oldskool gentlemen in Oswestry only 30 miles from my house, collected a powerscreen bottom end with rods and the powerscreen head free of charge before they went the skip, we sat for an hour and chatted all things OSS from nitrous to turbo's, we had a chat about the forum and his turbo charged slingy, oil boilered efe and nitrous bandit engine drag bike, he had some very nice machinery hopefully he ends up here, anyway im planning to turbo my 750ES when funds allow, but first where do I go from here, source a 1127 block to take out to 81mm and some busa pistons, for high compression motor or do I build a mild budget turbo motor for the ES is the powerscreen bottom end man enough etc, Awaiting your thoughts. Quote
Captain Chaos Posted September 25, 2018 Posted September 25, 2018 the powerscreen has helical primary gears (between crankshaft and clutch), they don't take big power very well according to those who know. But other people who can know, say that is only a problem on assembled (aircooled) crankshafts, the oilcooled ones are one piece and it will be fine. I guess there's only one way to find out. Do it. Quote
Swirl Posted September 25, 2018 Author Posted September 25, 2018 2 minutes ago, Captain Chaos said: the powerscreen has helical primary gears (between crankshaft and clutch), they don't take big power very well according to those who know. But other people who can know, say that is only a problem on assembled (aircooled) crankshafts, the oilcooled ones are one piece and it will be fine. I guess there's only one way to find out. Do it. Exactly what I was aiming at cheers CC, how much is big power Quote
wraith Posted September 25, 2018 Posted September 25, 2018 (edited) Know someone who had a very tuned powerscreen motor with nitrous but kept blowing it up each time it got near 200 bhp Edited September 28, 2018 by wraith I Pad change what I had put. Quote
george 1100 Posted September 26, 2018 Posted September 26, 2018 busa pistons won't give you high compression 1 Quote
Oilyspanner Posted September 27, 2018 Posted September 27, 2018 Using Busa pistons will allow you to use any grade of fuel though ! Good for a turbo motor, CR is about 8.5:1 I think. Quote
dupersunc Posted September 27, 2018 Posted September 27, 2018 1 hour ago, Oilyspanner said: Using Busa pistons will allow you to use any grade of fuel though ! Good for a turbo motor, CR is about 8.5:1 I think. You could run on paraffin at 8.5:1 1 Quote
Duckndive Posted September 27, 2018 Posted September 27, 2018 I think the dutch guy G Gerts "spilling sorry" used a power-scream motor and went over 300bhp Personally I always go for straight cuts but if you are only going low beans it should not be an Huge issue Quote
Swirl Posted October 2, 2018 Author Posted October 2, 2018 well things got interesting this morning, i've been back and seen my new mate Hank and purchased some interesting bits, paeted with some cash and came away with theses Quote
Swirl Posted October 2, 2018 Author Posted October 2, 2018 Posibly 1186cc 80mm je pistons with a casting of 79mc4 can't find any info online thou 3 Quote
clivegto Posted October 2, 2018 Posted October 2, 2018 Nice, they are not high comp ones. Tell us about the blower man. Quote
Swirl Posted October 2, 2018 Author Posted October 2, 2018 23 minutes ago, clivegto said: Nice, they are not high comp ones. Tell us about the blower man. Don't anything about the blower Clive only its in my boot and I need to get some pics of it and do some research 1 Quote
Duckndive Posted October 2, 2018 Posted October 2, 2018 Pistons look like they have had the crown machined down.... Quote
Swirl Posted October 2, 2018 Author Posted October 2, 2018 5 minutes ago, Duckndive said: Pistons look like they have had the crown machined down.... Quote
Swirl Posted October 2, 2018 Author Posted October 2, 2018 I'm gonna have to go the boot aren't I, in my tender state, pass me my crutches Quote
Swirl Posted October 2, 2018 Author Posted October 2, 2018 22 minutes ago, clivegto said: Got any closer up pics @Swirl Some pics of the snail Quote
Swirl Posted October 2, 2018 Author Posted October 2, 2018 25 minutes ago, clivegto said: Got any closer up pics @Swirl Quote
Swirl Posted October 2, 2018 Author Posted October 2, 2018 27 minutes ago, clivegto said: Got any closer up pics @Swirl Quote
Swirl Posted October 2, 2018 Author Posted October 2, 2018 When you pump the number in the Je website, it comes up with nothing, it's only a casting number, build number should be on the top unless special order Quote
clivegto Posted October 2, 2018 Posted October 2, 2018 @DuckndiveIs right they have been machined down, I have a brand new set sat on the shelf I never got round to using yet. 79mm pistons with a comp of 13.:1 1166cc for 1052 & 1186cc for the 1127. You need to do a bit of measuring. Quote
Swirl Posted October 2, 2018 Author Posted October 2, 2018 Not sure if they have been machined down, JE's website states casting numbers are the same on different compression ratio pistons, cast the same and the crown finished differently, will have a measure up when I get in the garage Quote
clivegto Posted October 2, 2018 Posted October 2, 2018 OK but they are 79mm making it 1186cc in a power screen motor. You will need to do a dry build to measure the deck hight & volume mate. Quote
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