ae85 fiend Posted January 23, 2013 Share Posted January 23, 2013 Hi guys, so I was reading online about this guys 20v 7agte in a ke70 race car, it produces around the 500hp mark. He says that he uses the 7afe crank in the bottom half of his 7age, but has used the end of the 4age 8 bolt crank ( supposedly a whooooole lot stronger ) I was just wondering how you'd go about doing this? Would it be worth it in the end? Im only after the 350HP mark in my ae85 with my 20v 7agTe... This way your able to use the 4age/ 4agze clutch and stuff which is easier to find/ replace/ save a few $$$. Any advice would be awesome. Cheers Quote Link to comment Share on other sites More sharing options...
KKtrips Posted January 23, 2013 Share Posted January 23, 2013 Simple solution = buy this and improve on it - you will be much better off. //oldschool.co.nz/index.php?/topic/36297-fs-4agte-w55-clutch-w-a-bell-etc-chch/ Quote Link to comment Share on other sites More sharing options...
thegreatestben Posted January 23, 2013 Share Posted January 23, 2013 There was a chap in aus who went to the trouble of making grubscrew like caps to fill the 6 bolt holes of the 7a crank and then had it redrilled to 4a 8 bolt. remember seeing pics and it looked really well done and very expensive. best option - have a flywheel made. Quote Link to comment Share on other sites More sharing options...
DJZ Posted January 23, 2013 Share Posted January 23, 2013 If you are talking about this one it looks like it has been welded and redrilled. Can't see it being that much "stronger", two dowels would probably be sufficient if you feel there is a weakness. Quote Link to comment Share on other sites More sharing options...
flyingbrick Posted January 23, 2013 Share Posted January 23, 2013 Yeap bugger welding up the holes and drilling. Spigot size is prob different too, keep that in mind. Prob easier / safest to use 7a fly that's re drilled to suit the 4age clutch cover if that's important ( or weld and redrill the 4age clutch to suit 7a fly) Dozens of options all easier and more cost effective than crank modifications. Just IMO. 1 Quote Link to comment Share on other sites More sharing options...
thegreatestben Posted January 23, 2013 Share Posted January 23, 2013 Yeah you definitely need dowels in the crank, the builder of my engine, Bazz & Matt Dunn from toyspeed all had flywheel failures. From my experience, I wouldn't bother with the 7a block. Mine netted 222kw atw with a TD05 from an Evo 4 @ 20psi. It had a pretty decent clutch but started to fry it after 2 or 3 power runs on the dyno. It's far easier and cheaper to get sweet clutches/flywheels for the 8 bolt pattern. I'd be very suprised if the 200cc makes it drive that much better or make that much more power etc... Quote Link to comment Share on other sites More sharing options...
flyingbrick Posted January 23, 2013 Share Posted January 23, 2013 As far as strength goes it's probably more important that you use high quality fasteners of the most appropriate tensile strength that are tightened to the most appropriate torque etc. or you could even easily go up a thread size and do all work by hand if careful Quote Link to comment Share on other sites More sharing options...
ae85 fiend Posted January 23, 2013 Author Share Posted January 23, 2013 Simple solution = buy this and improve on it - you will be much better off. http://oldschool.co....-bell-etc-chch/ I probably would have if this came up 6 or so months back lol, but I've pretty much just finished buying everything I need for my 7age conversion - just needing forged conrods and some sort of ECU to run it... But yeah, don't have the cash/ time to change engine for the 4th time for it haha. Quote Link to comment Share on other sites More sharing options...
ae85 fiend Posted January 23, 2013 Author Share Posted January 23, 2013 So redrilling/modding the 7a flywheel would be the best way about it? Sweet. I'll try start organising someone to help me out with that. Any specific shops/ people I should be looking for? Cheers Quote Link to comment Share on other sites More sharing options...
Dell'orto Posted January 23, 2013 Share Posted January 23, 2013 See if you can buy just the crank off Barry? http://www.mrpltd.co.nz/product/290/7a-stroker-kit-1-9l.html Quote Link to comment Share on other sites More sharing options...
xsspeed Posted January 23, 2013 Share Posted January 23, 2013 That one is a different i think dellorto, its either a 2zz (not joking) crank or he based it on 2zz rod angles or something so it truly is a stroker kit for 7a takes them to 1.9 ish litres Quote Link to comment Share on other sites More sharing options...
xsspeed Posted January 23, 2013 Share Posted January 23, 2013 That said i'd say Barry could offer insight to using or ditching the 7a crank Quote Link to comment Share on other sites More sharing options...
evil_si Posted January 23, 2013 Share Posted January 23, 2013 Cant say id think welding to a crank would be a good idea, id imagine it would quite possibly fuck with the hardening, Imo i think that pictured crank has "inserts" fitted, then redrilled Quote Link to comment Share on other sites More sharing options...
Seedy Al Posted January 23, 2013 Share Posted January 23, 2013 Yum 7a. They are fun but yeah, I'm going to go with filled and drilled Quote Link to comment Share on other sites More sharing options...
xsspeed Posted January 23, 2013 Share Posted January 23, 2013 JB weld /spam Quote Link to comment Share on other sites More sharing options...
SHGWAG Posted January 23, 2013 Share Posted January 23, 2013 There was a chap in aus who went to the trouble of making grubscrew like caps to fill the 6 bolt holes of the 7a crank and then had it redrilled to 4a 8 bolt. remember seeing pics and it looked really well done and very expensive. best option - have a flywheel made. How was the 7AGE done in your AW Ben? Quote Link to comment Share on other sites More sharing options...
thegreatestben Posted January 24, 2013 Share Posted January 24, 2013 Doweled 7a flywheel with a 3 puck exedy motorsports clutch. The weakest link: Not the weakest link: Quote Link to comment Share on other sites More sharing options...
Dell'orto Posted January 24, 2013 Share Posted January 24, 2013 That one is a different i think dellorto, its either a 2zz (not joking) crank or he based it on 2zz rod angles or something so it truly is a stroker kit for 7a takes them to 1.9 ish litres Annnnnd? More cubes = FTW Quote Link to comment Share on other sites More sharing options...
kpr Posted January 29, 2013 Share Posted January 29, 2013 4age and more rpm is the answer 1 Quote Link to comment Share on other sites More sharing options...
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