bonnet mods

[squariel]

anyone done this.



tips needed

[ikarl]

that looks lovely

[mulaz]

What colour is that? it looks great

[cartledge_uk]

What colour is that? it looks great

Looks like Medium Red Pearl (3H4)


The mod itself has been done before, MartG has one, Paul woods has done a few i think. That one does look neat though.

[MartG]

Cut & paste from my thread elsewhere:

Off came the bonnet


Marked out


And cut


Now for the other side


Welded




OK, not the biggest bonnet vent on the planet, but hopefully will aid cooling and reduce front end lift a little

Filled the sides ( styrene sheet and Isopon )


While that was setting, I removed the rad fans, and refitted my modified radiator clamps – they now hold the rad in the same position as in a Mk1a. This should allow a little more upward airflow.



Isopon set – time for the expanding foam filler

[squariel]

nice
thank you.

now where is my slitting disc.

[SJ80]

That looks great!

[Boddney]

MartG, the only man in the world with an mr2 bonnet shape sprayed on to his garden as a unique grass feature. LOL
I like the idea.
I also like the mod and the good simple write up.

Nice one!

[PW@Woodsport]

That's not a bonnet vent....

THIS is a bonnet vent

[squariel]

not bad.
shame the frunk is us though.

[PW@Woodsport]

Frunk still perfectly useable, the vent dives into the front panel which has been chopped out to allow the airflow, so it has lost very little frunk space.

[squariel]

kool.

gonna make me one then.

[PW@Woodsport]

No

[squariel]

humpf.

i used to like you.

[PW@Woodsport]

We are actually going to get this one moulded up, so you will be able to buy a FG insert that goes where the centre section of the bonnet is, making it relatively easier to DIY

[squariel]

come on then, that sounds brill.

like you again now.

[MartG]

If you're interested in Mk1 aerodynamics, have a read of this http://www.mr2oc.com/showthread.php?p=2 ... ost2630951

The CFD plot on the first page of that thread clearly shows the low pressure area on the bonnet that a bonnet vent will remove, thus reducing front end lift at speed.

[SuperRedMR2]

stupid question paul - what stops the water going into the radiator fans? or is that not an issue?

[PW@Woodsport]

Not an issue, the fans are exposed to the elements on all mk1s, plus the water running off my vent misses the fans anyway.

[squariel]

wow that was one interesting read about airflow.

the rear spoiler is next to useless