Max 255hp vs Alti 240
12-08-2001, 05:50 PM
#1
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Join Date: Dec 2001
Posts: 39
Max 255hp vs Alti 240
I have had my 3.5 Alti for almost 3 months now and it is one hella of a fast ride. But I would really like to have that extra 15hp that the 02 Max has without resorting to aftermarket bolt-ons (at least not yet). So I've been researching the difference and it looks like it boils down to two items. Compression ratio and exhaust. The Alti has a 10.0 to 1 compression ratio and I believe the Max has a 10.3 to 1. This would be the case if the Max is the same as an 02 i35 which has 10.3 to 1. On the exhaust side, the exhaust system on the 3.5 Alti has a one foot section of pipe directly under the gas tank that has been intentionally restricted (flattened) by Nissan. Presumably to lower the HP rating so as not to compete with the Max. But I am not certain about the differences in the compression ratios and need confirmation from someone that has an 02 Max service manual (this is the only place the compression ratio is listed). Anyone out there have an 02 Max service manual yet that would be willing to look this up?
12-08-2001, 10:40 PM
#4
The exhaust difference of that 1 foot flat pipe cant make 15 more hp difference at the crank. Cause those HPs are measured at the cranks, I dont think that one foot bend can do that much increase at the crank.
Dixit
Dixit
12-08-2001, 10:42 PM
#5
Originally posted by BigDogJonx
The exhaust difference of that 1 foot flat pipe cant make 15 more hp difference at the crank. Cause those HPs are measured at the cranks, I dont think that one foot bend can do that much increase at the crank.
Dixit
The exhaust difference of that 1 foot flat pipe cant make 15 more hp difference at the crank. Cause those HPs are measured at the cranks, I dont think that one foot bend can do that much increase at the crank.
Dixit
12-09-2001, 01:02 AM
#7
Originally posted by yo_its_ok
All I know is that w/ 102 miles on the car...my dad was driving my sister's 3.5SE and he egged me on to race... so at one light he goes for it...even with my mods, and running consistent 15.2, I was beat by 3/4 a carlength...I don't want to know how bad I get my (__)__) handed to me by a 02.
On a roll in traffic...thats different...
All I know is that w/ 102 miles on the car...my dad was driving my sister's 3.5SE and he egged me on to race... so at one light he goes for it...even with my mods, and running consistent 15.2, I was beat by 3/4 a carlength...I don't want to know how bad I get my (__)__) handed to me by a 02.
On a roll in traffic...thats different...
What mods you have? Cause I am about to race my friend new 3.5SE Alty and I thought he may at most beat me by one car length, all I got is an oscai and udp.
Dixit
12-09-2001, 01:18 AM
#8
Originally posted by yo_its_ok
Custom intake, Y-Pipe, 2.5" RT Cat, 2.5" SS mid Pipe to factory muffler. Custom fuel rails w/ AN Fittings, and Aeroquip SS Lines, PowerDyne FPR, 300ZX TT Fuel Pump, Fuelsafe 15 gallon fuel cell painted black. Level Ten VB w/ Billet TC 2700 stall speed. (Stage 3 custom tranny w/ LSD on way.) No UDP, TB bypass, and custom Titanium Butterfly w/ Ti Screws.
Other internal mods.
Still waiting for my IMPUL ECU w/ remapped fuel curve and powerband to 7000rpm, so I can exploit all the fuel pressure.
Custom intake, Y-Pipe, 2.5" RT Cat, 2.5" SS mid Pipe to factory muffler. Custom fuel rails w/ AN Fittings, and Aeroquip SS Lines, PowerDyne FPR, 300ZX TT Fuel Pump, Fuelsafe 15 gallon fuel cell painted black. Level Ten VB w/ Billet TC 2700 stall speed. (Stage 3 custom tranny w/ LSD on way.) No UDP, TB bypass, and custom Titanium Butterfly w/ Ti Screws.
Other internal mods.
Still waiting for my IMPUL ECU w/ remapped fuel curve and powerband to 7000rpm, so I can exploit all the fuel pressure.
But I guess the range on the dyno chart on a 2002 atly must be nicer.
But it still matters how well he launches, he aint that good.
Dixit
12-10-2001, 06:48 AM
#9
Senior Member
Join Date: Jun 2001
Posts: 144
No one is for sure there even is a 15HP difference yet. We will have to wait for some good member dynos to start comming in, hopefully with both cars on the same dyno. There have been 2 3.5 Maxs dynoed (both very disappointing) and 0 3.5 Altimas dynoed.
12-10-2001, 08:42 AM
#10
Senior Member
Join Date: Sep 2001
Location: Detroit Metro Area
Posts: 1,617
Originally posted by c5hardtop
No one is for sure there even is a 15HP difference yet. We will have to wait for some good member dynos to start comming in, hopefully with both cars on the same dyno. There have been 2 3.5 Maxs dynoed (both very disappointing) and 0 3.5 Altimas dynoed.
No one is for sure there even is a 15HP difference yet. We will have to wait for some good member dynos to start comming in, hopefully with both cars on the same dyno. There have been 2 3.5 Maxs dynoed (both very disappointing) and 0 3.5 Altimas dynoed.
Stereodude
12-10-2001, 01:43 PM
#11
Senior Member
Join Date: Jun 2001
Posts: 144
Originally posted by Stereodude
Too bad no one has correctly Dyno'd a 3.5 Max yet. I wouldn't be getting disappointed yet.
Stereodude
Too bad no one has correctly Dyno'd a 3.5 Max yet. I wouldn't be getting disappointed yet.
Stereodude
12-10-2001, 06:06 PM
#12
Senior Member
Join Date: Jul 2001
Posts: 179
Power to weight!!!!!!!
Originally posted by c5hardtop
That is why I said we need to see some "good" member dynos, I expect those will not be typical. Not disappointed yet.
That is why I said we need to see some "good" member dynos, I expect those will not be typical. Not disappointed yet.
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