Re: Best tip for more power...
Posted: Thu Nov 19, 2020 6:06 pm
Datsun Roadster Forum-311s.org
The Resource For All Things Datsun Roadster S211/SPL212/310/311 Datsun Sports Roadster 1959-April 1970 circa 40,000 produced
https://www.311s.org/phpBB3/
Best tip for more power...
Page 2 of 2
Re: Best tip for more power...
Posted: Thu Nov 19, 2020 9:47 pm
So, if I want 2 liter Solex performance in the 69 1600, all I've gotta do is eliminate 600 lbs and have the engine run like new.
If I just toss the body I'll be most of the way there.
We're not talking about a '72 Buick wagon here, meaningful weight reduction is not as practical as an engine swap.
Dan
If I just toss the body I'll be most of the way there.
We're not talking about a '72 Buick wagon here, meaningful weight reduction is not as practical as an engine swap.
Dan
Re: Best tip for more power...
Posted: Thu Nov 19, 2020 11:24 pm
More power: buy modern lightweight car with big fuel injected, turbo'd, or supercharged engine. Or a damn Tesla.
Re: Best tip for more power...
Posted: Fri Nov 20, 2020 7:50 am
+1 on the diet
not sure on the wax - unless friction - only noticeable 145+
+1 on go faster stripes - the more the merrier - just make sure they are horizontal - not those annoying slow down 45 degree BRE stripes, or even Paul Gabriels- subtle under paint ones , not impressed.
not sure on the wax - unless friction - only noticeable 145+
+1 on go faster stripes - the more the merrier - just make sure they are horizontal - not those annoying slow down 45 degree BRE stripes, or even Paul Gabriels- subtle under paint ones , not impressed.
Re: Best tip for more power...
Posted: Fri Nov 20, 2020 1:50 pm
Weight reduction is not as practical as an engine swap? Hahaha sorry but I have to disagree.greydog wrote: ↑Thu Nov 19, 2020 9:47 pm So, if I want 2 liter Solex performance in the 69 1600, all I've gotta do is eliminate 600 lbs and have the engine run like new.
If I just toss the body I'll be most of the way there.
We're not talking about a '72 Buick wagon here, meaningful weight reduction is not as practical as an engine swap.
Dan
Weight reduction = free
New engine swap = a lot more than free
Also I wasn't comparing my 1600 to a 2 liter solex so I'm not sure how that got thrown in. I simply said weight reduction is a great tip for "increasing" your hp
Re: Best tip for more power...
Posted: Fri Nov 20, 2020 11:54 pm
Keith mentioned rotating mass. Nick that is a major reason your engine is so fun.
I doubt it’s making more than SAE100hp and unless you are on a highway in Montana, you never using that..
It's torque in the useful powerband 3k-6500 that makes it so fun on the street and a very light rotating assembly
Your engine’s rotating and reciprocating mass are much less than 90% of other 1600’s and 99% of U and H20’s. Makes a huge difference in the way it accelerates.
You are certainly right that shedding weight is helpful where possible.
I doubt it’s making more than SAE100hp and unless you are on a highway in Montana, you never using that..
It's torque in the useful powerband 3k-6500 that makes it so fun on the street and a very light rotating assembly
Your engine’s rotating and reciprocating mass are much less than 90% of other 1600’s and 99% of U and H20’s. Makes a huge difference in the way it accelerates.
You are certainly right that shedding weight is helpful where possible.
Re: Best tip for more power...
Posted: Sun Nov 22, 2020 10:15 am
But weight keeps you from sliding off the road (public roads )and sure brakingGregs672000 wrote: ↑Wed Nov 18, 2020 1:58 pm Weight reduction was central to the approach of Lotus. You don't need 500hp to push around a 1400lb car. Helps in the corners too!
Low Lbs per square inch on tires racing around
My 86 Subaru XT turbo coupe ...I put 80 series wide tires on it ...had 13" alloy s
It would slide braking when you weren't expecting .taking a long curve a bit to fast , it slid 9" where a heavier only 2-3 "
Re: Best tip for more power...
Posted: Sun Nov 22, 2020 1:04 pm
"Your engine’s rotating and reciprocating mass are much less than 90% of other 1600’s and 99% of U and H20’s. Makes a huge difference in the way it accelerates."
^ This. Modern equivalents of pistons/rods in engines of similar displacements as the 1600 and 2000 engines in our cars are near half the weight or LESS!
The difference this makes in performance cannot be overstated. It is a night and day difference. There are no downsides. It also makes for a smoother running engine with the reduction in reciprocating weight. Combined with a lightweight flywheel, even with no other changes, the engine with the lightweight parts will have a big advantage.
^ This. Modern equivalents of pistons/rods in engines of similar displacements as the 1600 and 2000 engines in our cars are near half the weight or LESS!
The difference this makes in performance cannot be overstated. It is a night and day difference. There are no downsides. It also makes for a smoother running engine with the reduction in reciprocating weight. Combined with a lightweight flywheel, even with no other changes, the engine with the lightweight parts will have a big advantage.
Re: Best tip for more power...
Posted: Wed Nov 25, 2020 1:44 pm
Right I also completely agree with that - which is why I had to opt in for your lightened flywheelJT68 wrote: ↑Fri Nov 20, 2020 11:54 pm Keith mentioned rotating mass. Nick that is a major reason your engine is so fun.
I doubt it’s making more than SAE100hp and unless you are on a highway in Montana, you never using that..
It's torque in the useful powerband 3k-6500 that makes it so fun on the street and a very light rotating assembly
Your engine’s rotating and reciprocating mass are much less than 90% of other 1600’s and 99% of U and H20’s. Makes a huge difference in the way it accelerates.
You are certainly right that shedding weight is helpful where possible.
I'm going to do a few test runs on a straight closed road to see what kind of times I am getting (maybe 1/4 mile, 0-60, etc). Technically I have only once gone full throttle from 0-70 and I was VERY happy with how it felt. But that was not timed at all so who knows maybe it just felt really good lol. Thanks again JT for all the great work you put into this engine
