Hello all, I'm relatively new to GT4 and am just wondering how you complete an engine rebuild when your horse power starts dropping. I can change the oil regularly (obviously a good first step), but port polishing and so forth I've already done once and apparently can't do again ... any tips? I've searched hi and low on these and other forums and still cannot find any kind of solution. Help please!!!
Engine Rebuilds ...
- Thread starter Martini
- 5 comments
- 1,408 views
Looks as though a few people have seen this thread now, and still no answers. Perhaps if I'm a little more specific. After a period of time, your cars Horse Power decreases due to wear. Changing oil regularly is one way to combat this effect, but it doesn't wholly address the issue. At present I have a Corvette 00' with an available 740 HP (and it had 740 HP when it was brand new) and I am only getting 695 HP now. Fundamentally, how do you restore lost HP? I've read elsewhere you can 'rebuild' your engine, but I can't seem to replace any of the components (e.g. racing chip) or do another port polish ... Does anyone know how? Cheers ...
- 5,481
- Seattle, WA
- RykonZero
I am sorry, but you can't. The oil change, port polish, and chassis refresh is about it. You will never see the missing 45 hp again. Do not pass GO, Do not collect $200, go straight to jail. Good-bye.
mafia_boy
(Banned)
- 5,570
- GTP_Mafiaboy
Stig's right guys....we should end thread here but I'll explain in a bit more detail for ya.
The key is to keep your cars as low mileage as possible with regular oil changes. I know that the Spec-C can do 300km straightaway then shows signs of wear, but an oil change will bring it back to full power, but this will only continue until you hit the 1000km mark, then any power loss you experience can't be brought back.
Same goes with 2nd hand cars, buy as close to the price limit changes as possible. For example, a 40000km-41000km car will perform better than an equivalent car with say 48000-49000km due to the fact it's had 8000km less of wear and tear on it. My guide is this and while it's not 100% foolproof, it helps me get the best priced used cars for the mileage done and the most power from each class of used car. For example:
Anything Pre '97 - More than 64000km - After oil change, less power than factory claims.
Anything Pre '97 - 60000km-62000km for the cheap examples, when oil change is done, it's brought back to what the factory would claim.
Anything Pre '97 - 40000km-42000km for the decent examples, when oil change is done, it's brought back to about 3% above factory claims.
Anything Post '97 - 40000km-42000km for the cheap examples, when oil change is done, it's brought back to about 5-7% above factory claims.
Anything Post '97 - 20000km-22000km for the best value examples, have about 30-40% off their new price tag and after oil change, it's brought back
to 5-12% above factory claims.
Any 10.0km (6.2mi) examples after oil change get an easy 5% increase.
Anything brand new after oil change gets an easy 5% increase aswell.
All of it depends on the car you're using. An R33 can get more, as can an RX7, others like the Lotus Esprit HC, not as much.
Mafs!!
The key is to keep your cars as low mileage as possible with regular oil changes. I know that the Spec-C can do 300km straightaway then shows signs of wear, but an oil change will bring it back to full power, but this will only continue until you hit the 1000km mark, then any power loss you experience can't be brought back.
Same goes with 2nd hand cars, buy as close to the price limit changes as possible. For example, a 40000km-41000km car will perform better than an equivalent car with say 48000-49000km due to the fact it's had 8000km less of wear and tear on it. My guide is this and while it's not 100% foolproof, it helps me get the best priced used cars for the mileage done and the most power from each class of used car. For example:
Anything Pre '97 - More than 64000km - After oil change, less power than factory claims.
Anything Pre '97 - 60000km-62000km for the cheap examples, when oil change is done, it's brought back to what the factory would claim.
Anything Pre '97 - 40000km-42000km for the decent examples, when oil change is done, it's brought back to about 3% above factory claims.
Anything Post '97 - 40000km-42000km for the cheap examples, when oil change is done, it's brought back to about 5-7% above factory claims.
Anything Post '97 - 20000km-22000km for the best value examples, have about 30-40% off their new price tag and after oil change, it's brought back
to 5-12% above factory claims.
Any 10.0km (6.2mi) examples after oil change get an easy 5% increase.
Anything brand new after oil change gets an easy 5% increase aswell.
All of it depends on the car you're using. An R33 can get more, as can an RX7, others like the Lotus Esprit HC, not as much.
Mafs!!
- 10,557
- Columbia, MD.
- Parnelli_Bones
Port & Polish and Engine Balancing are one-time upgrades. They are services provided on your engine once (and never again).
That being said...there is no "rebuild" feature in GT4, which kinda sucks. It seems odd that you can get a Chassis Refresh to an aging car as it encounters bumps and foils of the road, but you can't get an engine rebuild.
You can do oil changes, of course, but eventually (as mafia_boy has so kindly detailed) you'll find yourself with permanent horsepower loss; especially if you rag your car till it's dying.
Just wanted to add this: make sure you're not redlining your engine, and (especially) you shouldn't be driving so that your car's engine is hitting the RPM limiter....this will guarantee eventual permanent power-loss. A Corvette engine should have ample area for the powerband to do its thing without you revving into the redline area at all...so use throttle with discretion--dont' just mash the gas as you leave those corners, and try using a manual transmission to keep revs where they should be if your'e not doing so already.
That being said...there is no "rebuild" feature in GT4, which kinda sucks. It seems odd that you can get a Chassis Refresh to an aging car as it encounters bumps and foils of the road, but you can't get an engine rebuild.
You can do oil changes, of course, but eventually (as mafia_boy has so kindly detailed) you'll find yourself with permanent horsepower loss; especially if you rag your car till it's dying. Just wanted to add this: make sure you're not redlining your engine, and (especially) you shouldn't be driving so that your car's engine is hitting the RPM limiter....this will guarantee eventual permanent power-loss. A Corvette engine should have ample area for the powerband to do its thing without you revving into the redline area at all...so use throttle with discretion--dont' just mash the gas as you leave those corners, and try using a manual transmission to keep revs where they should be if your'e not doing so already.
