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Old 08-01-2013, 06:15 PM   #1
Von551
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Best ways to add more bottom end to our MK3?

I did the snorkel delete, just need to buy a K&N drop-in still. I think that will help. I want to make my car more snappy off the bottom from stops or slow corners. Will a cat-back help? Chip-tuning? CAI? Looking for answers from others who have already tuned their cars to gain more bottom end. The mid and top end of this car is great, it's just so bogged at the bottom under 3,000 RPM's. Thanks!


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Old 08-01-2013, 06:23 PM   #2
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E focus rmm helps a lot, it removed slack. Cai just sounds cool (top end gains), same with exhaust) best bet is to get 4 more cylinders ;-). Joking aside, the bottom end is there, the environmental nuts at ford made it limp the save gas. Being said, it's all a throttle response issue; with that being said, I suggest you purchase the injected engineering tune and it will make you smile as the lag is virtually gone (I don't have it, I am only going by what I have read)
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That or the new SMurF mod ;)
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Old 08-02-2013, 01:20 PM   #3
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The K&N drop in filter has been wonderful and if you drive it in the same fashion before, should get the same mpg. It did help a bit on the lag if not got rid most of it. 4cly NA 2L and less tend to not have a lot of torque in low rpms. I've seen this across many different cars and smaller 4cly engines. So ya, a turbo IS the answer but not practical building it up from scratch (when you'd just have bought an ST).

What WILL improve low end torque is being able to adjust/control your cams (both). So really, having the intake cam having a lot of advance timing will give you more low end torque. You could physically advance your cams but it would be picked up by the cam position sensor and have the engine retard timing for safety.

More to come on this!
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Old 08-02-2013, 01:32 PM   #4
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Some from good ol' wikipedia :) to come (needs to be formatted!)

http://en.wikipedia.org/wiki/Variable_Valve_Timing
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Old 08-02-2013, 01:39 PM   #5
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better: http://www.compcams.com/catalog/COMP...log_2012_8.pdf
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Old 08-02-2013, 04:11 PM   #6
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Quote:
Originally Posted by Tjrommel View Post
E focus rmm helps a lot, it removed slack. Cai just sounds cool (top end gains), same with exhaust) best bet is to get 4 more cylinders ;-). Joking aside, the bottom end is there, the environmental nuts at ford made it limp the save gas. Being said, it's all a throttle response issue; with that being said, I suggest you purchase the injected engineering tune and it will make you smile as the lag is virtually gone (I don't have it, I am only going by what I have read)
I second this ^. I have the Injected Tune and it has made quite the difference to the responsiveness of the throttle and the lag in the bottom end is basically gone. I have the E focus rmm but haven't gotten an opportunity to install it yet but I have heard the same things as what Tjrommel is saying.
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Old 08-02-2013, 05:51 PM   #7
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Oh, as others have mentioned, I believe the best overall gains with zero cutting/non-reversable modding is the K&N drop in and removing the snorkel and diverting the lower air duct right up to the inlet (I had used a old license plate!). Then just use higher octane gas. You'll most likely net a few more mpg and decent HP/tq increase for not a lot more $$ (for me, around $4-7 more for premium gas per full tank).
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Old 08-02-2013, 06:00 PM   #8
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Seriously, just get the tune and thank those that suggested it later. You'll see the most noticeable gain in what you seek out of all the suggestions in this thread.
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Old 08-02-2013, 07:19 PM   #9
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Quote:
Originally Posted by Roadworthy View Post
Oh, as others have mentioned, I believe the best overall gains with zero cutting/non-reversable modding is the K&N drop in and removing the snorkel and diverting the lower air duct right up to the inlet (I had used a old license plate!). Then just use higher octane gas. You'll most likely net a few more mpg and decent HP/tq increase for not a lot more $$ (for me, around $4-7 more for premium gas per full tank).
If you're not running premium I would definitely do that. It may take it 2 or 3 tanks to fully adjust. See this thread for what others thought: http://www.focusfanatics.com/forum/showthread.php?t=274381
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Old 08-03-2013, 01:59 PM   #10
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thanks everyone. I'm definitely going to do the SCT tune from Tom, already talking to him. I'll do the K&N drop-in as well. I'd like to do a Steeda intake, but I don't think they're CARB legal (I'm in California) and I like having a sleeper that's faster than it sounds. I started running 91 octane a 1,000 miles ago and seem to be feeling the difference now.
Thanks!
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