Keeping The Party Cool! Mishimoto's Fiesta ST Radiator R&D!

[Rejeme]

I wonder if having the boomba racing intake spacer is going to push the intake manifold to close to the radiator?

I share your concern. Hopefully, the new fan shroud will allow enough clearance.

 

[mishimoto1]

I wonder if having the boomba racing intake spacer is going to push the intake manifold to close to the radiator?

I share your concern. Hopefully, the new fan shroud will allow enough clearance.

We will have to check into this to ensure appropriate clearance with both of these pieces installed.

Thanks for the input and heads-up guys!

-John

 

[Young L]

We will have to check into this to ensure appropriate clearance with both of these pieces installed.

Thanks for the input and heads-up guys!

-John

lookin forward to the results

I share your concern. Hopefully, the new fan shroud will allow enough clearance.

if its an issue it wont keep from the radiator, plenty of other ways to make up for it.

 

[RAAMaudio]

I am sure this is going to turn out being one of the best mods this car needs

I have a DIY Mishimoto MMRAD-T200-94 Celica GT radiator installed and decided to use the stock fan as well, no shroud but mounted to the standoffs on the radiator, Setrab oil cooler, DHM big IC and bumper, opened up grill. The radiator install was a huge task and not one I would do again if I could buy a direct fit Mishimoto!

I have not tracked the car but some pretty spirited driving on a hot day up a canyon road and making 300WHP with no heating issues at all. Not fast but quick runs and used boost to pass quite a few cars, quickly, around 600lbs in the car with myself, my wife, two big dogs, cargo, up over the I80 from Reno to Sacramento, again hot day, no heating issues and I have not even finished sealing up the air flow to the coolers yet.

If I am having this much success with what I have done I am sure the direct fit one will be even better

You are going to make a lot of people happy when this is finally done, glad you are taking the time to do it right!

Rick

 

[mishimoto1]

lookin forward to the results

if its an issue it wont keep from the radiator, plenty of other ways to make up for it.

Thanks!

I am sure this is going to turn out being one of the best mods this car needs

I have a DIY Mishimoto MMRAD-T200-94 Celica GT radiator installed and decided to use the stock fan as well, no shroud but mounted to the standoffs on the radiator, Setrab oil cooler, DHM big IC and bumper, opened up grill. The radiator install was a huge task and not one I would do again if I could buy a direct fit Mishimoto!

I have not tracked the car but some pretty spirited driving on a hot day up a canyon road and making 300WHP with no heating issues at all. Not fast but quick runs and used boost to pass quite a few cars, quickly, around 600lbs in the car with myself, my wife, two big dogs, cargo, up over the I80 from Reno to Sacramento, again hot day, no heating issues and I have not even finished sealing up the air flow to the coolers yet.

If I am having this much success with what I have done I am sure the direct fit one will be even better

You are going to make a lot of people happy when this is finally done, glad you are taking the time to do it right!

Rick

Thank you very much for the input Rick. Glad you were able to fit one of our radiators into your Fiesta, and it seems to be working quite well for you. Sorry we did not have this project complete in time to save you the challenge of installing that component.

Sounds like you've completed a similar modification path that we are following, and I have to assume this will keep things under control on the track. Do you have any upcoming plans for a track event?

Thanks again for using our radiator and for the kind words regarding our development.

-John

 

[Dustys318]

What is really needed for our cars are heat extractors. To much heat is rolling in the engine compartment with no escape. I was doing some research and came across the below website. I replicated their process (yes, I bought a Magnahelic gauge) and found that our hoods are completely pressurized from about 31mph on up. The only draw/negative pressure area was the outer edges of the hoods behind the headlights, coincidently were the R5 has their hood vents. I purchased a set of hood vents from Sico out of the UK as the older Fiesta hood vents would be ineffective at speeds because those vents are in the center-ish of the hood; makes sense as the curve of the hood on older Fiesta's/RSs is more rounded/curved causing (I'm assuming) a negative pressure behind that curve of the hood...

http://www.autospeed.com/cms/articl...tomotive-Modification-ToolKit-Part-3&A=111111

 

[LT Berzerker]

What is really needed for our cars are heat extractors. To much heat is rolling in the engine compartment with no escape. I was doing some research and came across the below website. I replicated their process (yes, I bought a Magnahelic gauge) and found that our hoods are completely pressurized from about 31mph on up. The only draw/negative pressure area was the outer edges of the hoods behind the headlights, coincidently were the R5 has their hood vents. I purchased a set of hood vents from Sico out of the UK as the older Fiesta hood vents would be ineffective at speeds because those vents are in the center-ish of the hood; makes sense as the curve of the hood on older Fiesta's/RSs is more rounded/curved causing (I'm assuming) a negative pressure behind that curve of the hood...

http://www.autospeed.com/cms/articl...tomotive-Modification-ToolKit-Part-3&A=111111

You should do a write up of your testing and results and post it very interested in this...

 

[Dustys318]

You should do a write up of your testing and results and post it very interested in this...

Ha! I wish I'd taken pictures of the car with all the yarn strings taped to the hood! Harbor Freight was my friend for the clear hoses used, couldn't find it anywhere else...

 

[LT Berzerker]

I just wish we could get an R5 wrc hood or simply the vents... Sico vents aren't exactly the same

 

[Dustys318]

No, they are not but they are half the cost of the R5 vents!

 

[RAAMaudio]

Very cool and low pressure approach

Looking forward to results of the hood vents.

I have wanted to save weight by using a CF hood but none really looked to be effective enough so looking into vents, now that you have done the testing I know what are probably the best vents to get.

Posted else where but for those looking into under trays, etc... I have a full depth one, all the way to the 2 point brace/mount I built and I was advised to vent it to help pull more air out of the engine bay. Easiest and biggest area was in front of the brace/ mount, it is 14" wide and curves up, sides lined, brace has an angle on it to direct flow, towards the DP, it helped a great deal.

Additional venting not done yet or tested, two upside down NACA ducts more forward and to the sides, not as much room to work and not going to flow into more open areas like the DP one I have.

 

[RAAMaudio]

NOTE!

You may want to run another test.

If you put a Guerney flap, raised lip, etc, in front of any hood vent it will induce negative pressure behind it, done right a vent can still be effective in different places on the hood.

Unfortunately we do not have the room to work out a radiator vent to the top of the hood, sealed...those are hugely effective and create downforce with little or no induced drag and usually decrease it. They just happen to look bad ass as well

----------------

Maybe Mishimoto can find some time to work on hood vents for us

 

[maestromaestro]

Second that!

 

[Dustys318]

Yes, you can put like a mini bug deflector in front of any vent to cause a pull but aesthetically speaking it wouldn't look good. The R5 actually has a straight up then 90° forward lip. I was told it was to keep heavy, wet mud or snow to creep along the hood and block the opening. So I looked for something cheaper and not too WRC/racy looking...

 

[Siestarider]

I ordered Julian Edgar's books this week, am following the research paths Edgar recommends and Dusty318 has apparently already done some of. I will post results when I get some.

Mishimoto surely has all the tools and more expertise, I third the idea of their researching Fist aero aides for cooling and downforce.

 

[Dustys318]

There is a FiST in the UK that has a small NACA duct by front edge of hood. He made his own ram air to the factory air box! Looks cool, and since the whole hood is pressurized I'm sure it's pretty effective too!

 

[RAAMaudio]

I like the looks of the Sico vents but $500 shipped is a bit nuts to me even though I have a ton of money into the car.

I am way more into performance than looks so I could live with something less to look at but but also like my cars to be relatively stealthy and already get to much attention so have not done any vents yet. If it was a purely track car I would do whatever it took to make it better and smile as I passed so many drivers in their "superior" cars

Which I have done and will do more of as it is.

I like your mod list by the way and your posts, you have some great knowledge and sharing it, thanks!

Rick

 

[JasonHaven]

I'm technically dumb, but definitely interested in keeping the car cool with my experiences this last summer. Hopefully this thing is pretty straight forward to have a mechanic or maybe a local here, install for me

(which is why I asked you guys if you do installs haha)

 

[Dustys318]

The front grill opening is roughly 116 inches of open area. The Sico vents are roughly 34 inches of opening, each. That 68 inches to the 116 will induce a forced flow to push the heat out.. blah blah something about 50% for optimum flow blah blah.. anyhoo, I know the $500 seems a lot but I won't have to change out a complete cooling system that (I'm guessing) will be a lot more considering intercoolers average $600... I went this route to reduce front end lift at high speeds and increase cooling efficiency without having to change the radiator... two birds, one stone...

 

[RAAMaudio]

I agree on reducing lift of course and they will help a great deal, I hope enough for your needs and they do weigh less than a bigger radiator, oil cooler, bigger IC

I just wish the price was more reasonable or better yet Seibon would make a lite weight hood with vents like that.