Rotary RX7 engine into a locost kit car?
Discussion
I have recently got my hands on a Locost chassis which i have welded and put together, it is familiar to a Caterham 7. I've been thinking of which engine to put in it before i choose suspension and other parts etc.
I have researched on an RX7 twin rotar twin turbo engine, would this be suitable? any ideas or advice?
I have researched on an RX7 twin rotar twin turbo engine, would this be suitable? any ideas or advice?
Have a look at this guys profile http://www.pistonheads.co.uk/gassing/profile.asp?h...he has a rotary powered fury which is basically a Syla striker in a smoother body.
As mentioned above Ive read about the guy fitting the RX7 lump too. Cannot see any reason why it couldnt be done.
I think from what Ive read you need to have some basic knowledge on the rotary engine as they need to be well setup to run properly.
Would imagine it would be bloody quick in a 7 style though with all that torque and revving 8k +!
I think from what Ive read you need to have some basic knowledge on the rotary engine as they need to be well setup to run properly.
Would imagine it would be bloody quick in a 7 style though with all that torque and revving 8k +!
thescamper said:
Have a look at this guys profile http://www.pistonheads.co.uk/gassing/profile.asp?h...he has a rotary powered fury which is basically a Syla striker in a smoother body.
His is a Stylis, isn't it? More info here: http://www.pistonheads.co.uk/gassing/topic.asp?h=0...skwdenyer said:
thescamper said:
Have a look at this guys profile http://www.pistonheads.co.uk/gassing/profile.asp?h...he has a rotary powered fury which is basically a Syla striker in a smoother body.
His is a Stylis, isn't it? More info here: http://www.pistonheads.co.uk/gassing/topic.asp?h=0...Sorry for the lack of useful content, but just thought I'd say.
Hi guys,
Its my stylus that you refer to, thanks for the comments, its very similar to a fury. I used a live axle and mated it to the RX7 gearbox and engine. I would keep the RX7 gearbox, they are cheap, very strong and have a great feel to them. They are also well geared for the engine. If i could hit 6800 rpm in fifth gear, I would doing 195 mph
Which RX7 are you thinking of using?, also what rear end are you using? Live or IRS?
It will definately fit without any need for much modding.
antnicuk said:
Hi guys,
Its my stylus that you refer to, thanks for the comments, its very similar to a fury. I used a live axle and mated it to the RX7 gearbox and engine. I would keep the RX7 gearbox, they are cheap, very strong and have a great feel to them. They are also well geared for the engine. If i could hit 6800 rpm in fifth gear, I would doing 195 mph
Which RX7 are you thinking of using?, also what rear end are you using? Live or IRS?
It will definately fit without any need for much modding.
just looked at your car again mate, bl00dy lovely! lolIts my stylus that you refer to, thanks for the comments, its very similar to a fury. I used a live axle and mated it to the RX7 gearbox and engine. I would keep the RX7 gearbox, they are cheap, very strong and have a great feel to them. They are also well geared for the engine. If i could hit 6800 rpm in fifth gear, I would doing 195 mph
Which RX7 are you thinking of using?, also what rear end are you using? Live or IRS?
It will definately fit without any need for much modding.
looks like there might be room for a tripple rotor engine to!!
Chris.
Thanks, its a very nice.
I was looking at the 13B engine, haven't yet got a Rx7 to 'borrow' the engine and gearbox.
Not sure about the back end yet, any recommendations, i have a good feel when driving rear wheel cars but i live in teh country with uneven road surfaces but i want to take it to a track day eventually once i'm happy and confident....any recomendations?
Cheers guys
actually i was thinking the perfect engine would be the twin turbo 13b-rew? i am hoping for the UK version. It all depends on packaging issues as i want a balanced car and not engine bits sticking out of the car.
I was looking at the 13B engine, haven't yet got a Rx7 to 'borrow' the engine and gearbox.
Not sure about the back end yet, any recommendations, i have a good feel when driving rear wheel cars but i live in teh country with uneven road surfaces but i want to take it to a track day eventually once i'm happy and confident....any recomendations?
Cheers guys
actually i was thinking the perfect engine would be the twin turbo 13b-rew? i am hoping for the UK version. It all depends on packaging issues as i want a balanced car and not engine bits sticking out of the car.
Edited by bluetester on Wednesday 18th March 14:26
if money is no object then the REW is the engine to go for. As for rear end, it will depend on what car you are going for. There are varying opinions but IMO if you are using it mainly on the road which is as you say bumpy, then IRS may be the best option. Are you building your own chassis or buying a kit from someone?
http://www.locostusa.com/forums/viewtopic.php?f=35...
and
http://www.locostusa.com/forums/viewtopic.php?f=35...
and
http://www.locostusa.com/forums/viewtopic.php?f=35...
and
http://www.locostusa.com/forums/viewtopic.php?f=35...
I'll leave you to carry on seaching for others.
and
http://www.locostusa.com/forums/viewtopic.php?f=35...
and
http://www.locostusa.com/forums/viewtopic.php?f=35...
and
http://www.locostusa.com/forums/viewtopic.php?f=35...
I'll leave you to carry on seaching for others.
working on that one, my cousins fury with a 200 bhp vauxhall engine has just been rebuilt and now the gearbox has died (possible) and he is getting p155ed off with it so we maybe sticking an RX8 engine in it. There is a supercharged one in the UK that makes 350 ish at the wheels at 9500 rpm
antnicuk said:
working on that one, my cousins fury with a 200 bhp vauxhall engine has just been rebuilt and now the gearbox has died (possible) and he is getting p155ed off with it so we maybe sticking an RX8 engine in it. There is a supercharged one in the UK that makes 350 ish at the wheels at 9500 rpm
Brill news mate! keep us posted on how the build gose. i have seen a company from the states selling kits for the RX-8 using procharges C2 blower. they recon around 300bhp at the wheels with 12psi. they state that the stock RX* engine runs 11.0-1 static comp. is this correct? also how do rotory engines handle high boost presures? do they suffer from as much dept as normal engines?
Cheers
Chris.
the RX8 is higher compression than the rx7. The last 2 rx7's had the same compression but i cant remember what they are.
Rotaries dont like as much boost as a piston engine but some people run up to 1.5 bar on the road but they wont last long, the drag cars in this country on race fuel run up to 2 bar. I generally run a max of 1 bar and .08 on track although the stylus only runs .5 bar.
The main problem is tuning the car, if they det once you will likely kill the engine, so you have to tune upto an invisible limit without going over it, with a piston engine you wind the boost up until it dets and then wind it back a bit.
12 psi is quite a lot for an RX8 and i think the engine mileage would be serious reduced.
We are also in the process of using a supercharged 2 rotor engine in the back of a VX220. We are going for the Procharger model that is race spec to take the higher revs, the eccentric (crank) shaft assembly has been balanced so it should cope with 9500 - 10000 rpm.
Before we do that we have to finish the 3 rotor RX7 which has been a pain in the arse from the start. We got it all running but the pull type clutch mechanism failed!!! engine needs pulling to replace the catch ring. Thats saturday sorted!!
It looks like the fury is being given one last chance, its a BGH geartec at the moment, the gear lever snapped and it needs a new clutch and some of the syncros replacing so its being done as we speak.
The rx8 engine project will probably go into a new tiger chassis we have........eventually
Rotaries dont like as much boost as a piston engine but some people run up to 1.5 bar on the road but they wont last long, the drag cars in this country on race fuel run up to 2 bar. I generally run a max of 1 bar and .08 on track although the stylus only runs .5 bar.
The main problem is tuning the car, if they det once you will likely kill the engine, so you have to tune upto an invisible limit without going over it, with a piston engine you wind the boost up until it dets and then wind it back a bit.
12 psi is quite a lot for an RX8 and i think the engine mileage would be serious reduced.
We are also in the process of using a supercharged 2 rotor engine in the back of a VX220. We are going for the Procharger model that is race spec to take the higher revs, the eccentric (crank) shaft assembly has been balanced so it should cope with 9500 - 10000 rpm.
Before we do that we have to finish the 3 rotor RX7 which has been a pain in the arse from the start. We got it all running but the pull type clutch mechanism failed!!! engine needs pulling to replace the catch ring. Thats saturday sorted!!
It looks like the fury is being given one last chance, its a BGH geartec at the moment, the gear lever snapped and it needs a new clutch and some of the syncros replacing so its being done as we speak.
The rx8 engine project will probably go into a new tiger chassis we have........eventually
some really intresting projects there mate! the VX220 should be fun.
If you cant turn the boost up, whats the best way to make more power??? more RPM?? also i hear these engine move LOADS of air! i have heard RX7 guys running MASSIVE Garrett GT47 turbos (think these have 88mm comp wheels!!). is that cos they shift soo much air compeard to a piston engine??
Chris.
If you cant turn the boost up, whats the best way to make more power??? more RPM?? also i hear these engine move LOADS of air! i have heard RX7 guys running MASSIVE Garrett GT47 turbos (think these have 88mm comp wheels!!). is that cos they shift soo much air compeard to a piston engine??
Chris.
Hi,
Here is a video of a rotary powered G27/33 raced by Mark Walklett.
http://www.youtube.com/watch?v=ChMNhT3XYLM
Here is a video of a rotary powered G27/33 raced by Mark Walklett.
http://www.youtube.com/watch?v=ChMNhT3XYLM
chuntington101 said:
some really intresting projects there mate! the VX220 should be fun.
If you cant turn the boost up, whats the best way to make more power??? more RPM?? also i hear these engine move LOADS of air! i have heard RX7 guys running MASSIVE Garrett GT47 turbos (think these have 88mm comp wheels!!). is that cos they shift soo much air compeard to a piston engine??
Chris.
The way to more power is more porting or different types of porting, bigger turbos and yes more revs.If you cant turn the boost up, whats the best way to make more power??? more RPM?? also i hear these engine move LOADS of air! i have heard RX7 guys running MASSIVE Garrett GT47 turbos (think these have 88mm comp wheels!!). is that cos they shift soo much air compeard to a piston engine??
Chris.
They do need huge amounts of air, on the 3 rotor RX7 we have a GT45 which is too small, we sent it away to be modified and the turbo guy said that turbo on a RB26 (skyline) engine should make over 1000 bhp but it maxed out at 600 flywheel bhp on the 3 rotor and wouldnt make more than 0.9 peak dropping off to 0.8 bar of boost.
The VX is going to be a dedicated track car. Its going to be interesting to see how a rotary engine runs with a transverse gearbox. We are using a Mondeo V6 box as its slightly wider than a 4 pot box so the half shafts miss the exhaust ports. We also went for the ford box as the Noble uses it and make good power, also an LSD is available if we need.
It should make 350 rwhp and come in at about 900 kg fingers crossed.
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