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Bigger Turbo ... No Computer

G-Money

By G-Money,
in Engines & Forced Induction

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GeeTR Grand Master

GeeTR

Posted
Posted

Good son of rajab theres been some corkers this weekend.

Its like making a cordial drink man. The aim is to make MORE drink, but at the same have the same strength taste. Uv got the ability with your big turbo to pour (move more air) more water into the glass, but where as a weak (lean) drink will just agitate you.. a lean mixture will uncontrollably ignite in your engine and pop it.

FPR (and pressure raise) + SAFC will allow some leeway... but really, if you KNOW you want power, and have a bigger tahbin in mind, grab a real aftermarket ECU and some injectors, sell the FPR and tune to your next bottleneck.

Its not just about a free flowing water source, u gota be able to accurately meter your cordial concentrate delivery, otherwise its weak city and boom.

kjb_r33 Experienced

kjb_r33

Posted
Posted
Good son of rajab theres been some corkers this weekend.

Its like making a cordial drink man. The aim is to make MORE drink, but at the same have the same strength taste. Uv got the ability with your big turbo to pour (move more air) more water into the glass, but where as a weak (lean) drink will just agitate you.. a lean mixture will uncontrollably ignite in your engine and pop it.

FPR (and pressure raise) + SAFC will allow some leeway... but really, if you KNOW you want power, and have a bigger tahbin in mind, grab a real aftermarket ECU and some injectors, sell the FPR and tune to your next bottleneck.

Its not just about a free flowing water source, u gota be able to accurately meter your cordial concentrate delivery, otherwise its weak city and boom.

That my friend, is a GREAT analogy. very good

funkymonkey Grand Master

funkymonkey

Posted
Posted

could've used scotch, but cordial's more PG I guess. No one likes watered down scotch.

Although there is a catch, if the wastegate in your turbo is set to a very low boost at standard then running it with no aftermarket ECU should be safe, it won't be the best, but it'll be safe. I mean, if you had a TD06 25G, and the wastegate was set to 8 PSI (hypothetically speaking of course) then its no different to a standard sized turbo with a wastegate set to 8 PSI, as after it reaches this amount of pressure both turbos will bypass. In fact being a bigger turbo you might find that at lower RPM's the turbo dosen't spool up fast enough to push as much air, and thereby gives you a RICHER mixture. However this is only if your bigger turbo runs an internal wastegate that's set to a close to stock pressure... most aftermarket turbos aren't.

Bottom line, your fuel needs to match the air going in, running rich or lean is not optimal... but too lean can be dangerous.

fEkuaR Experienced

fEkuaR

Posted
Posted
could've used scotch, but cordial's more PG I guess. No one likes watered down scotch.

Although there is a catch, if the wastegate in your turbo is set to a very low boost at standard then running it with no aftermarket ECU should be safe, it won't be the best, but it'll be safe. I mean, if you had a TD06 25G, and the wastegate was set to 8 PSI (hypothetically speaking of course) then its no different to a standard sized turbo with a wastegate set to 8 PSI, as after it reaches this amount of pressure both turbos will bypass. In fact being a bigger turbo you might find that at lower RPM's the turbo dosen't spool up fast enough to push as much air, and thereby gives you a RICHER mixture. However this is only if your bigger turbo runs an internal wastegate that's set to a close to stock pressure... most aftermarket turbos aren't.

Bottom line, your fuel needs to match the air going in, running rich or lean is not optimal... but too lean can be dangerous.

No entirely accurate.. a bigger turbo at standard boost will still flow more air then a smaller turbo at the same boost. Also the maps will be completely incorrect for the turbo flow.

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