I received my front end but the front bumper opening is too small, around half of my intercooler.





Should I need to open it (width and height) because there are some reinforcements I'll need to cut.
If so,which tools do you advise me?

 

I would not touch it. The difference will not be measurable.

 

Looking at your pics, you don't have much material at the top and bottom of the bumper. Unless you have more then 2'' of intercooler behind left side the bumper I would leave it alone.

If you do need to cut it you will need some 3m blue tape, dremal tool with cut off wheel or jig saw. After the the cut you will need to reinforce the new edge with fiberglass from the inside.

 

Leave it alone. People are running air to air intercoolers with the front ends being closed. You should be fine

 

First question should be if this is a street/daily car or track car. If done correctly what's wrong with cutting a few inches off a bumper? besides the intercooler it might prevent a future over heating if it's a daily, if the radiator is also being blocked. MOST cars running closed fronts are track only or weekend warriors. The man went out a bought a intercooler to support his hp level only to have a cosmetic item restrict it. He didn't say will I get more Hp by opening the front. If he's not comfortable doing it himself then let a shop do it. I'm not trying to get into a debate of core width and air flow theory.

 

Exactly, an intercooler is like a radiator you need air to cool it down. If you are going to street drive the car at all you are going to have to open it up unless you don't mind overheating. If this is a track car only I guess you can leave it the way it is..

 

Thank you for your answers.
Yes the car is only for Drag racing.
the difference at 1/4 shouldn't be affect for you?

 

The first half of the core has the most effect on cooling the charge air. I would leave it the way it is.

 

It does? Do you have info to back that up?

 

Looks good the way it is!

 

That's exactly the amount I cut my closed bumper open per OGS rules only 50% needs to be exposed....I'm making a plate to cover it back up during other events.

 

My frontend is completely closed off right now. I've been up and down the road doing nothing but wot basically and neither ect or iats have went up a bit. I don't even have a very good intercooler either. I'm not sure how it will do in the middle of summer, but I'll find out.

 

Why have you totally closed off your front end? you think it could affect aerodynamic ?

Have you ever tried to spray some CO2 (extinguisher for example) or N2O on your intercooler before the run?

 

Of course it will help aerodynamics. I'm definitely not the first person to do it. Its been done enough that there's now a rule saying 50% of your ic has to show. Thankfully I'm not competing in any classes so it doesn't matter for me.

 

thx, why this rule saying 50% of your ic has to be exposed??

for a 1/4 mile, Aerodynamics affect more than open all the front bumper?

 

CCC Racing openned his Front bumper

 

Do you not understand that there's a rule stating atleast 50% of the ic has to be visible for certain classes? Before the rule was added, miller went low 8s with a closed front end. It works.

 

Well yea, a closed bumper for air/water adds up to me, but that's not what the thread's about.

 

Miller was air to air when he did what I said.

 

because they want the 8 second race cars to still appear to look like "street" cars same reason it needs to have a passenger seat

 

Do you not understand the OP is from France and the class rules that apply in North America may or may not apply to him?

Best suggestion to the OP is to research if there are any rules applying to open/closed front ends in certain classes, if there are any such rulings.

Then make a decision based on that.

At this point I would leave it alone until you find out more information, regardless, the amount you can cut out, should not make much, if any, difference in the grand scheme of things.

 

Do you not realize the reason I mentioned the rule is because he posted a pic of ccc racing's front end acting as if they opened it up because a closed front end can't work?

 

Depends on your MPH and how efficient your intercooler is . . . additionally how much boost you are running.


On a drag-only deal, typically the aerodynamics give more of an advantage than opening the intercooler does. Same with an alternator on a drag-only car. The parasitic loss isn't enough to overcome the small amount of voltage drop over a run.

 

Thank you
Did 9.4 finally and didn't t open it