Rhyscar Posted November 21, 2016 Author Share Posted November 21, 2016 Hmm yeah starting to sound like too many guestimates/aligning all the stars to get the maximum potential result with ditching dual vvti. I guess the large amount of tunability is it's biggest advantage over an older engine such as 4age/B18 etc. I'm torn between keeping the engine simple and factory and going all out cam-wise. 1 Quote Link to comment Share on other sites More sharing options...
Truenotch Posted November 21, 2016 Share Posted November 21, 2016 Definitely keep the VVT working if you can. Is there any info about big cams + VVT for 2ZZ engines? I know with the Beams it's a huge advantage to keep ~10 degrees of adjustability. Quote Link to comment Share on other sites More sharing options...
Rhyscar Posted November 27, 2016 Author Share Posted November 27, 2016 Yeah I agree VVT will be advantageous. I should stop having stupid ideas. how does cam selection for a dual vvti head differ from a normal engine? I presume its more about about having no compromises through the rev range than max peak power? Say aim for high cam to work good from 6-10k and make sure the low cam has response and torque from 3-7ish? There's hardly any info out there about the 2zz and cams other than the stage 1, 2, 3 monkey wrench racing/piper ones which means nothing to me as they don't list specs. It's still going to be in a racecar so if its crap below 3k I don't really care as long as the top and middle of the rev range keeps pulling. Rob you mentioned roller rockers - are they normally a requirement of extra lift or revs? or stiffer valve springs? These are the specs for the valvesprings I installed when we built the engine Seat pressure – 60 lbs @ 38.5mmOpen pressure – 155 lbs @ 26.5mmRate – 200 lb/inCoil bind height – 25mmMax net lift – 12.5mm two questions 1. are they adequate? 2. are they aggressive enough to warrant roller rockers? In other news I recieved some curvy trumpets from Glen in ozzyland. Luckily didn't come with any snakes and spiders. Looks like they will work. Going to need a bonnet bulge still but shouldn't be more than 60-70mm. Not going to use gay venty looking thing just run the airbox through the bonnet as it will be carbon anyway and probably look fine. Hopefully after christmas I'll order some carbon and start experimenting. 1 Quote Link to comment Share on other sites More sharing options...
Honda Ass Dragger Posted November 27, 2016 Share Posted November 27, 2016 Whats do the TRS motors use in terms of CAMS? Quote Link to comment Share on other sites More sharing options...
Rhyscar Posted November 27, 2016 Author Share Posted November 27, 2016 I don't quite know tbh. I've heard varying stories. One source said they just use the standard cam locked in high cam. But I have heard that they were a cam and head developed by Grant Rivers. Anyone got any more solid info? Quote Link to comment Share on other sites More sharing options...
Rhyscar Posted November 27, 2016 Author Share Posted November 27, 2016 All I know is they Rev to about 9500rpm and make 220hp at the fly. A standard engine makes 190hp atw so with a decent motec running it, some race gas, low friction sequential box and 600kg you can imagine the performance they get from them is plausible from a standard cam... Quote Link to comment Share on other sites More sharing options...
Honda Ass Dragger Posted November 27, 2016 Share Posted November 27, 2016 This Maybe of Interest to you: http://forum.jdmstyletuning.com/showthread.php?56329-Rally-Rolla-ZRE152 Quote Link to comment Share on other sites More sharing options...
Rhyscar Posted November 27, 2016 Author Share Posted November 27, 2016 Thats pretty cool. Geez thats some money going into a ZZE corolla! Quote Link to comment Share on other sites More sharing options...
Honda Ass Dragger Posted November 29, 2016 Share Posted November 29, 2016 Thats pretty cool. Geez thats some money going into a ZZE corolla! More complete: http://www.bmsc.com.au/forums/bmsc-members-rides/30434-rally-rolla-zre152-10.html Quote Link to comment Share on other sites More sharing options...
BobbyBreeze Posted November 30, 2016 Share Posted November 30, 2016 Variable valve timing just gives you some more flexibility with whatever cams you are running. So for instance you can extend the top end power with smaller duration cams or you can help the midrange & idle quality with some larger duration cams. On some VVT engines the cam phasers cannot handle extra valve spring load you need to run with higher rpm/boost builds so you have to look into that. I think the VVT 1JZ's have this issue. Very hard to tell what most aftermarket cams are like without trying them or hearing from someone who has uses them. Listed specs are often irrelevant or misleading, and even then there are a whole load of other factors that go into cam design over duration & lift. Roller rockers aren't needed, they are just a way to kill the VVL and lose some valvetrain mass on full race builds. They also require a redesigned cam lobe as the follower changes from a slipper pad to the roller. Those springs look suitable and should work well with stock parts or some upgraded cams etc. 1 Quote Link to comment Share on other sites More sharing options...
jakesae101 Posted November 30, 2016 Share Posted November 30, 2016 voldo are you making the cams for yourself these days? might hit you up at the beginning of next year for a custom rally cam for my mazda. Quote Link to comment Share on other sites More sharing options...
BobbyBreeze Posted December 1, 2016 Share Posted December 1, 2016 Yeah starting my own cam business. Currently balls deep in building my own CNC cam grinder. Its not together yet so I can't confirm when I will be able to help but certainly keen to help where I can. 1 Quote Link to comment Share on other sites More sharing options...
fuel Posted December 1, 2016 Share Posted December 1, 2016 I'll be after some 4G63 cams! Quote Link to comment Share on other sites More sharing options...
bigfoot Posted December 1, 2016 Share Posted December 1, 2016 I'll be after some 4G63 cams! Me too Quote Link to comment Share on other sites More sharing options...
Rhyscar Posted August 20, 2018 Author Share Posted August 20, 2018 So it’s probably about time I put an update on this. Since I last posted a lot has changed. I bought a house and got engaged! New shed is grouse and been actually working on the car and other people’s car quite a lot. Namely supercharging a k24 Honda engine. Damn it goes good. Progress report; rear diffuser side plates folded and fitted. Aim here is to empty the air from the rear tyre wells cleanly and just look cool and be functional-ish Lots of room for activities (got to get a bloody exhaust out here somehow too - but that’s a problem for another day) Fuel cell mounting is now complete also. Maybe over engineered it a little but it’s not going anywhere in a crash most importantly. Mounted straps to stainless tubing front and rear with bosses welded in. Was the strongest/lightest combo I could think of doing. Pretty glad this job is done it was a pain in the ass Haven’t finished off the plumbing for the top end of the fuel cell yet. Maybe it should be next on the list? 8 Quote Link to comment Share on other sites More sharing options...
BobbyBreeze Posted August 21, 2018 Share Posted August 21, 2018 Pics/deets on blown K24 plz. Glad you're getting back into this! Keen to see how it all pans out. Might give me some motivation to get 205gti sorted.. Quote Link to comment Share on other sites More sharing options...
Truenotch Posted August 22, 2018 Share Posted August 22, 2018 7 hours ago, BobbyBreeze said: Pics/deets on blown K24 plz. Glad you're getting back into this! Keen to see how it all pans out. Might give me some motivation to get 205gti sorted.. It's a K24 with a K20A head and an Eaton M90. Made 200kw at about 6.5psi on a pretty conservative tune - would make far more with water/meth injection, but it's super fun as it is. Build thread: https://nzhondas.com/topic/183910-k24k20-dc5-m90-what-could-go-wrong/ Here's a pic from part way through the assembly: 6 2 Quote Link to comment Share on other sites More sharing options...
Rhyscar Posted October 22, 2018 Author Share Posted October 22, 2018 On 22/08/2018 at 09:08, BobbyBreeze said: Pics/deets on blown K24 plz. Glad you're getting back into this! Keen to see how it all pans out. Might give me some motivation to get 205gti sorted.. Here is said motivation requested 5 1 Quote Link to comment Share on other sites More sharing options...
Testament Posted December 26, 2018 Share Posted December 26, 2018 On 22/10/2018 at 22:23, Rhyscar said: Here is said motivation requested Ooer nice. This is of interest to me. Do you know what ecu they used? Factory Honda or something else? Quote Link to comment Share on other sites More sharing options...
Truenotch Posted December 26, 2018 Share Posted December 26, 2018 13 hours ago, Testament said: Ooer nice. This is of interest to me. Do you know what ecu they used? Factory Honda or something else? Hondata. It works fine, but a link would be better so he could add an extra map for water/meth injection. 1 Quote Link to comment Share on other sites More sharing options...
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