Quote:
Originally Posted by radz28
I think Mike said there was still some tuning he could do in the mid-range, no? Also - converters and transmissions are different between cars these blowers are going to be on, so shift extension is going to be different anyways, isn't it? I believe the power/torque curves also effect extension if I recall. My point is, is that this isn't final and perhaps tuning might boost the low-end. If not, it is what it is. It's a big blower for an application like this anyways, isn't it? It gives a lot of room to grow, but if the car were going to stay in this configuration, it's probably better suited to a 2300 or the like. I can see the point that a little softer low-mid range might be slightly better for traction, but for those that like a top-end that doesn't stop pulling, that small sacrifice on the bottom to get the bigger hit on the top is better. Some people will give that up. Who cares? It's their money  |
He said there was a little more tuning he could do mid-range but it didn't read like it was much.
Gearing effects shift extension not Power.
Far as Transmission. Most PD stuff does not require a converter. Most folks that chooses to add one it's going to be a fairly small stall(<3000). So shift extension isn't going to change much on a PD equipped A8. With a 28" tire you are looking at 12-1300 rpm shift drops, except 3-4 which is like 600. M6 cars drop 1700+ unless they drop down to a 26" tire.
Far as traction. I am running a Whipple and with a 305/35/20 555r traction is not a issue. My initial dyno was 600whp/570wtq in 5th gear. It honestly looked a lot like the dyno curve in the OP but with more torque. The car felt no faster then bolt-on under 3k rpm because it had no timing down low. I added a bunch of timing back including a couple degrees up top and I am sure the Torque came way up. Still didn't cause any traction issues and the car is much faster. I can pull bottom 3's 0-60 on the street no problem. So no I wouldn't want to give up a bunch down low. It's much more fun to drive with the added midrange. Now it pulls from anywhere and doesn't stop. Big shit eating grin on my face after I dialed that in.
Room to grow is relative and It's all a balance...you don't want to sacrifice power under the curve for a big peak number. Hence why big cam cars never run like the power suggests on the street. It's all about the combo. Point is the new 2650 looks like the real deal for the right application. However most will not utilize it's potential with their build. The 2300 is plenty capable and has been mid 9's @ 145. Even the 1740 has been high 9's @ 140. So yes if you want to run 8's with a PD, then the 2650 is the right choice.
You are right it's other peoples money. I am simply offering my unbiased opinion based on my knowledge and experience. So I offered my two cents for those that would care to read an opinion from someone not trying to sell a product.
