K20RX7
Author
Discussion

GAVBEY

Original Poster:

72 posts

157 months

Saturday 29th September 2018
quotequote all
Hello Hello,

Just starting a little build thread of my latest project car.
1993 mazda RX7, Fitting a Honda K20a2 from a civic type r.... oh and a turbo.

Fitted up to the origonal FD gearbox.

Reasons:
more torque
same revs
full engine is £400
Easy power
Better mpg
Lighter
More reliable
Melted 4 rotary engines last year on track.



Cheers

tektas

293 posts

115 months

Saturday 29th September 2018
quotequote all
GAVBEY said:
Melted 4 rotary engines last year on track.
seems a good enough reason, especially since the RX-7 chassis is a very good one.

anonymous-user

70 months

Saturday 29th September 2018
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K20 lighter than the rotary? Great idea, I do love the FD though and my dream build would be a 4 rotor setup.

Podie

46,646 posts

291 months

Saturday 29th September 2018
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Ooh, looks interesting!

yellowstreak

634 posts

168 months

Saturday 29th September 2018
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One of the best looking cars ever made. What level of power are you aiming at?

Dr G

15,623 posts

258 months

Saturday 29th September 2018
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If only there was an easy portmanteau of 'Mazda' and 'Honda'...


wink

Mudgey

683 posts

190 months

Saturday 29th September 2018
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Yeeeesssssss!!! Nice project smile

Can you get the engine in underneath the bonnet? The k20 is rather tall!

What gearbox are you using?

GAVBEY

Original Poster:

72 posts

157 months

Saturday 29th September 2018
quotequote all
Cheers for the positive comments guys, i can assure you. in other places they were not so kind haha.

Power goals this year are limited to 400-450 as its the standard engine, next year ill fire some pistons and rods in and look for 6-700.

As said the car is very light and a well balanced car to start off with so i thought why not. I love fabricating and building cars,engines, mapping all sorts.

Bloody expensive hobby though.

Will keep you updated as i go. Making inlet manifold next when im not on daddy duty's.

GAVBEY

Original Poster:

72 posts

157 months

Saturday 29th September 2018
quotequote all
GAVBEY said:
Cheers for the positive comments guys, i can assure you. in other places they were not so kind haha.

Power goals this year are limited to 400-450 as its the standard engine, next year ill fire some pistons and rods in and look for 6-700.

As said the car is very light and a well balanced car to start off with so i thought why not. I love fabricating and building cars,engines, mapping all sorts.

Bloody expensive hobby though.

Will keep you updated as i go. Making inlet manifold next when im not on daddy duty's.


I Am Milk

1,067 posts

220 months

Saturday 29th September 2018
quotequote all
Oh yes.

Looking forward to this.

aka_kerrly

12,492 posts

226 months

Saturday 29th September 2018
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Wonderful plan!!!!!

GregK2

1,714 posts

162 months

Saturday 29th September 2018
quotequote all
Great project, following with interest.

yellowstreak

634 posts

168 months

Sunday 30th September 2018
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It's going to be lovely with 400 but 6-700hp?Holy Toledo!

Much anticipation!

GAVBEY

Original Poster:

72 posts

157 months

Tuesday 4th December 2018
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Hi Guys,

Little update. Been super busy with work, life, Little ones etc but got some more bits done.

Built inlet manifold out of some scrap alloy, Built exhaust turbo manifold and some geometry stuff for the steering rack.

The rack will sit around 20mm higher than stock but this will combat the bumpsteer a bit better as the car is quite a bit lower than it came out the factory.

Most of my build is covered on my dodgey youtube channel (BeyTek) But only updating monthly really. Im sure you guys all know what its like to be busy smile

Anyway here are some pictures. If you want to see how i made them in a little more detail check out the channel smile

https://www.youtube.com/channel/UCFD68SVTt5FPOeqAt...

Thanks

Gav.














Edited by GAVBEY on Tuesday 4th December 02:40

GAVBEY

Original Poster:

72 posts

157 months

Tuesday 4th December 2018
quotequote all
EXhaust manifold fabrication.

WARNING! Im not a welder of any shape or form. I dont do how to's etc, I know its not the best but it will do.









OHHH And Obvioulsy that threaded rod isnt staying there. That was just to hold the collector in that position sort of like a dodgey jig.

Worked a treat.








Next update will be for Clutch.

CG Motorsport are dealing with it. pretty simple. measure up the sizes i have with adaptor plate and gearbox. tekk them the splines i need and they make up my twinplate.

Im also going to use a concentric slave cylinder to make things a little more complicated, well its actually more to do with the RX7 gearbox has a pull type clutch and im wanting push type for future proofing.

Ill see if i can borrow somones lathe to make a peice to centralize the Input shaft of the gearbox and crank of the engine. Ill make a little brass bush up to act as a pilot bearing to keep things true. I dont fancy a flywheel or clutch come frlying through the car!

Cheers for now

Edited by GAVBEY on Tuesday 4th December 02:41

Custard400

136 posts

92 months

Tuesday 4th December 2018
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If you're not a welder you certainly aren't bad at it!

shalmaneser

6,195 posts

211 months

Tuesday 4th December 2018
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Great project.

What is the clearance like to the bonnet? Looks OK in the last pic, if tight...

Ellb123

117 posts

95 months

Tuesday 4th December 2018
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GAVBEY said:
WARNING! Im not a welder of any shape or form. I dont do how to's etc, I know its not the best but it will do.
Could of fooled me!

Cracking effort this, good to see it all home made too! I'll keep an eye on this and have a look at the video when im in from work.

K swap everything!

crossie

219 posts

253 months

Tuesday 4th December 2018
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Which gearbox adaptor are you using?

TheOversteerLever

1,350 posts

229 months

Tuesday 4th December 2018
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Great project and serious skills - I'm in!