Originally Posted by
turbotrev
I still slightly disagree.
A car that makes full boost at 3200 will still not be making power at 8k, it will be dying on its ass by then and I bet the backpressure would be through the roof esp if needing big boost to do it.
It might feel like it drives ok but that’s it.
No point in revving it that hard it’s its on full boost my 3200. You may as well change gear at 6.5/7k.
On the smaller turbos the more modern stuff is def better but the trade of for quick spool is still robbing power from the top end.
Once over 600 ish hp you won’t get quick spool (on cossies im talking)
Cheers Paul
But he doesnt want a 600+ car ?
He hasnt even really indicated about 500+ ?
The bottom line is still the same.
If on a budget, the best thing he can do now for a quick/easy and effective upgrade is dump the old T34 an fit a modern turbocharger. There will be no trade offs anywhere and he will very easily be able to see improvements everywhere. The old T3's etc are just crap by modern standards.
As for no point in changing gear or revving to 6500, 7000 etc If the engine is still happily making power, then you certainly can, and further.
But as said before, for a good and very fast road car you can use every day, that low boost/torque will make for a much faster car than some laggy thing you need to rev the crap out of it.
I've had shit setups before myself, or cams that simply push powerbands upwards, and killing everything low down...and ultimately are slower all round because of it. But yea as Adam mentioned they might go from nothing to a shove in the seat all of a sudden if that's what he's into.
That doesnt make it fast. If anything it just makes it slower and less predictable all round even if a headline power figure might be the same or slightly higher.
But it's entirely up to everyone what route they choose. But when the turbo is such a critical part, and an area where huge improvements in efficiency have been made in recent years....you cannot overlook that as a first thing to change.