Engine Modification 101?

[boybitz]

patanong din,
I've noticed on some cars, may parang heat shield yung sa headers nya, (I'll try to get pix) so nahihiwalay yung header from the radiator kumbaga.
Kung gusto ko gayahin to should I:
a) use something that absorbs the heat, metallic
b) use something that blocks the heat, fiberglass or other insulating material

Iniisip ko B dapat kasi ganyan yung purpose ng header wraps, pero why are the stock heat shields metallic, or meron lang insulating material sa ilalim nun?

magulo ba? :oops: haha

[k3rk]

Ayos! hehehehehehe very well explained!

[ghosthunter]

patanong din,
I've noticed on some cars, may parang heat shield yung sa headers nya, (I'll try to get pix) so nahihiwalay yung header from the radiator kumbaga.
Kung gusto ko gayahin to should I:
a) use something that absorbs the heat, metallic
b) use something that blocks the heat, fiberglass or other insulating material

Iniisip ko B dapat kasi ganyan yung purpose ng header wraps, pero why are the stock heat shields metallic, or meron lang insulating material sa ilalim nun?

magulo ba? :oops: haha

er... you can use fiberglass but you'll need a resin to hold it in place. The resin will eventually burn in such an application.

Stock headers sometimes have a sheet of metal over them being used as a heat shield and its effective. Reason is its reflecting back the heat that is being radiated from the headers. You can check the way its installed, there is a small gap between the headers and the heatshield. The heatshield does get hot though.

Having header wraps is more effective. But its a time consuming task to wrap every headers that comes down the assembly line. The heatshield is a simple device that can be bolted on in a few seconds.

[ssaloon]

since your max torque is around 3000rpm while your redline is at 6000rpm, I would suggest 4-2-1 headers and have them wrapped to reduce heat. If you have the choice, get headers with longer pipes. You can upgrade your pipings later.

dude, 7500rpm redline sa tach ko eh... yeah nga eh, ever since, i've been planning to get 4-2-1 headers to increase my low end torque. bagal tlga ng 1st gear ng galant eh. :roll: what do u mean by getting headers with longer pipes? :?:

[ssaloon]

since your max torque is around 3000rpm while your redline is at 6000rpm, I would suggest 4-2-1 headers and have them wrapped to reduce heat. If you have the choice, get headers with longer pipes. You can upgrade your pipings later.

dude, 7500rpm redline sa tach ko eh... yeah nga eh, ever since, i've been planning to get 4-2-1 headers to increase my low end torque. bagal tlga ng 1st gear ng galant eh. :roll: what do u mean by getting headers with longer pipes? :?:

[ghosthunter]

since your max torque is around 3000rpm while your redline is at 6000rpm, I would suggest 4-2-1 headers and have them wrapped to reduce heat. If you have the choice, get headers with longer pipes. You can upgrade your pipings later.

dude, 7500rpm redline sa tach ko eh... yeah nga eh, ever since, i've been planning to get 4-2-1 headers to increase my low end torque. bagal tlga ng 1st gear ng galant eh. :roll: what do u mean by getting headers with longer pipes? :?:

headers with longer pipes... usually headers join up from four pipe to two pipes to a single pipe by the time it gets to the bend around the oil pan. A header with longer pipes, the 4-2 junction will happen at the point just before where the headers bend around the oil pan. Then the 2-1 junction will be under the engine. This would help maintain the velocity of the exhaust gasses and also help the "scavenging" effect of the exhaust gasses from the cylinders.

[ssaloon]

so when i have my headers fabricated, i'd just tell them to make them with longer pipes?

also, where would you recommend to have headers installed?

i saw a thread in another msg board saying that he could refer me to someone who fabricates pipings using mandrel bent pipes. siguradong mahal yun! :?

[ghosthunter]

so when i have my headers fabricated, i'd just tell them to make them with longer pipes?

well, yes. But only if they have the "mold" for your car. If not, you'll have to leave your car with them for hours for them to custom job a set of long pipe headers for your car.

also, where would you recommend to have headers installed?

i saw a thread in another msg board saying that he could refer me to someone who fabricates pipings using mandrel bent pipes. siguradong mahal yun! :?

Usually I would recommend nodalos or fremuff but you can contact autoxer thru his email "autoxer*yahoo.com". I know he has a mandrel bender and he has the resources to probably fabricate your headers.

[ssaloon]

pwede na ipafabricate from headers all the way to exhaust pipings with mandrel bent pipes right? tapos kabit nalang sa muffler ko? tama po ba?

[meleagant8]

prof ghosthunter:mrgreen:

prof, somebody kasi told me na replacing the exhaust pipe can help improve engines performance (pero un nga limited kasi 1.3 carb siya), btw he is also using a 1.3 carb lancer.....tapos di naman daw maingay...

another alternative, can putting cold air into my intake help increase hp or faster accelration?lets say un lang ang mod na gagawin ko sa engine ko.....kasi pansin ko, the carb performs well pag malamig surroundings (like kung umuulang or kung gabi na)

i think there's a way na malagayan ng conetype ung mga carb diba?lalagyan lang ng tube?kasi ive seen this lancer gl, carb na 1.5, naka conetype tapos may tube...

[ghosthunter]

prof ghosthunter :mrgreen:

prof, somebody kasi told me na replacing the exhaust pipe can help improve engines performance (pero un nga limited kasi 1.3 carb siya), btw he is also using a 1.3 carb lancer.....tapos di naman daw maingay...

replacing the exhaust pipe with bigger diameter piping can help but we have to consider the engine that we are talking about. BTW, was the upgrade (of the other guy's lancer) to bigger pipes resulted in more useful power or just more fuel consumption? What other mods were done to the other Lancer 1.3 carb?

I also heard that replacing the stock carb with the carb from a large motorcycle engine can increase power... of course I can't confirm that myself. Medyo limited yung experience ko with carb engines kasi.

another alternative, can putting cold air into my intake help increase hp or faster accelration?lets say un lang ang mod na gagawin ko sa engine ko.....kasi pansin ko, the carb performs well pag malamig surroundings (like kung umuulang or kung gabi na)

i think there's a way na malagayan ng conetype ung mga carb diba?lalagyan lang ng tube?kasi ive seen this lancer gl, carb na 1.5, naka conetype tapos may tube...

It always possible to do stuff with cars. You can install a cone filter with the tube from Simota if you have enough clearance between your engine and hood for such. So in this case, Simota cone filter kits are the best choice since it'll come with all the stuff you'll probably need. But this is called a "warm air intake" because it still takes air from inside the engine bay.

But if you want a cold air intake (CAI), then you'll need to make an extension tube from the Simota tube to your bumper or fender so you can get cooler air outside the engine bay. This would give you that extra power you feel on cold nights or rainy days. One D.I.Y. (do it yourself) way is to get the big hose from a laundry washer/dryer from a hardware store (like ACE or Handyman). Using ring clamps, you can attached the ends to the tube and filter. It will not look pretty but it does work to a degree.

Another alternative to a cold air intake (CAI) is replacing one of your headlights into a funnel to feed air to your intake. One way is to have a fiberglass funnel made. The other is to have a surplus headlight into a funnel by removing the glass, bulb and other stuff and making a hole in the rear big enough to pass enough air thru it for the engine. You can see this kind of intake in some Civics on the road. If you drive often at night, you might want to get some fog-lights installed to make up for the loss of one headlight.

[>]

Always start with Air flow... Exhaust system and Sport Air Filter
Di Recomended ang Sport Air Filter sa Places na palaging baha... open na open kasi eh.
The straighter the exhaust system the better.8)

[ghosthunter]

Di Recomended ang Sport Air Filter sa Places na palaging baha... open na open kasi eh.

To each their own... I drive thru flooded areas because the way to my shops get flooded every often when it rains hard but I still have an open filter.

The straighter the exhaust system the better.8)

true but that'll will only be important if you have a big displacement engine or forced induction. With a 1.6 or less displacement normally aspirated engine, it's less important.

[ssaloon]

yup, and i think yung race filters na delekado sa baha eh yung mga ram intake na sa may grill ng bumper nakalagay eh. yung ang delekado unless naka air bypass valve sila like the one of AEM which was featured in SCC a couple of months back. nilublob tlga nila yung filter sa aquarium equipped with the bypass valve, wala tlgang umaangat na tubig eh! galing! :mrgreen:

[tgz_dragster]

to have a customized CAI...

mas maganda siguro kung design k nlang ng air scoop na naka direct sa air filter mo..

different cars have different design... bahala na may ari doon...

[meleagant8]

kaso problema....kung di marunong ung may ari...like me...:oops:

[ghosthunter]

kung di marunong... try contacting autoxer... he'll do it for you... just have the cash ready.

[meleagant8]

really?
sayang di ko pa natanong ko bos ferman un....kaya nya mag design ng CAI sa carb na car?

meron dito sa amin na special promo ung gomags...wala pang 5t..headers+mufflers....di ko lam kung safe siya eh...

[ghosthunter]

really?
sayang di ko pa natanong ko bos ferman un....kaya nya mag design ng CAI sa carb na car?

He'll probably use the elbow joint from an existing filter kit (like Simota) then use the straight section and have it cut to need. He did a custom job for me because I needed an intake tube to adapt the electric supercharger I was trying to install in my car then. Very clean yung final work.

[vermicelli]

is it the e-RAM?